Maybe it is not "correct way". But for me it really works.
I used CppUnit 1.12.0
First Server...
Server
Tasks
In <exec> and .bat file for launching tests.
It is required that this but file first delete privious results.
Than launch tests and using XmlOutputter, put results at "Results.xml"
<exec>
<executable>TestRunner.bat</executable>
<baseDirectory>***</baseDirectory>
<buildTimeoutSeconds>10</buildTimeoutSeconds>
</exec>
Publisher
I like that build can be identified by NUnit, so I use the same method.
And send to NUnit, exe file that return 1 or 0, depend on result.
It has something
int main(int argc, char* argv[])
{
...
return wasSucessful ? 0 : 1;
}
It is a usual way for CppUnit. Who used cppUnit just once, should know these strings.
Then I add to log recieved results.
<nunit>
<path>IsSucessful.exe</path>
<assemblies>
<assembly>*noassembly*</assembly>
</assemblies>
<outputfile>empty.xml</outputfile>
</nunit>
<merge>
<files>
<file>Results.xml</file>
</files>
</merge>
<xmllogger />
Now build failds if CppUnit tests failed.
Lets update results at Dashboard...
Dashboard
I've updated unittests.xsl , to make tests in usual manner.
Changed unittests.xsl is attached - unittests.xsl.
How cppUnit xml looks.
You can find standart example at cppunit-cvs-1.12.0\contrib\xml-xsl\tests.xml.
In same folder xsl-transformation for cppUnit to JUnit, but I don't know how to use "double transformation" for CC.NET dashboard. 
And here is my example
<TestRun>
<FailedTests>
<FailedTest id="5">
<Name>MyMathOperationsTest::testAdd</Name>
<FailureType>Assertion</FailureType>
<Location>
<File>c:\test_cc\demon\cpp\src\tests4prj\mymathoperationstest.cpp</File>
<Line>28</Line>
</Location>
<Message>equality assertion failed
- Expected: 10
- Actual : 11
</Message>
</FailedTest>
<FailedTest id="6">
<Name>MyMathOperationsTest::testDivideThrow</Name>
<FailureType>Error</FailureType>
<Message>uncaught exception of unknown type
</Message>
</FailedTest>
</FailedTests>
<SuccessfulTests>
<Test id="1">
<Name>MoneyTest::testConstructor</Name>
</Test>
<Test id="2">
<Name>MoneyTest::testEqual</Name>
</Test>
<Test id="3">
<Name>MoneyTest::testAdd</Name>
</Test>
<Test id="4">
<Name>MoneyTest::testAddThrow</Name>
</Test>
</SuccessfulTests>
<Statistics>
<Tests>6</Tests>
<FailuresTotal>2</FailuresTotal>
<Errors>1</Errors>
<Failures>1</Failures>
</Statistics>
</TestRun>
Variables
<xsl:variable name="cppunit.result.list" select="/cruisecontrol/build/TestRun"/>
<xsl:variable name="cppunit.failed.list" select="$cppunit.result.list/FailedTests/FailedTest"/>
<xsl:variable name="cppunit.failed.count" select="count($cppunit.failed.list)"/>
<xsl:variable name="cppunit.passed.list" select="$cppunit.result.list/SuccessfulTests/Test"/>
<xsl:variable name="cppunit.passed.count" select="count($cppunit.passed.list)"/>
<xsl:variable name="cppunit.case.count" select="$cppunit.result.list/Statistics/Tests"/>
<xsl:variable name="cppunit.failure.count" select="$cppunit.result.list/Statistics/Failures"/>
<xsl:variable name="cppunit.error.count" select="$cppunit.result.list/Statistics/Errors"/>
Update Test Statistic
<!-- "Old"
<xsl:variable name="total.time" select="$nunit2.time + $junit.time"/>
<xsl:variable name="total.notrun.count" select="$nunit2.notrun.count"/>
<xsl:variable name="total.run.count" select="$nunit2.case.count + $junit.case.count - $total.notrun.count"/>
<xsl:variable name="total.failure.count" select="$nunit2.failure.count + $junit.failure.count + $junit.error.count"/>
-->
<xsl:variable name="total.time" select="$nunit2.time + $junit.time"/>
<xsl:variable name="total.notrun.count" select="$nunit2.notrun.count"/>
<xsl:variable name="total.run.count" select="$cppunit.case.count + $nunit2.case.count + $junit.case.count - $total.notrun.count"/>
<xsl:variable name="total.failure.count" select="$cppunit.failed.count + $nunit2.failure.count + $junit.failure.count + $junit.error.count"/>
For know it is absent testTime for cpp unit, but you can add "Chrono-plugin" if it is major for you.
Short Details
First add "apply-templates"
<xsl:apply-templates select="$cppunit.failed.list"/>
<xsl:apply-templates select="$junit.error.list"/>
<xsl:apply-templates select="$junit.failure.list | $nunit2.failure.list"/>
<xsl:apply-templates select="$nunit2.notrun.list"/>
Then add template before "<!-- Unit Test Errors -->"
<xsl:template match="FailedTest">
<tr>
<xsl:if test="position() mod 2 = 0">
<xsl:attribute name="class">section-oddrow</xsl:attribute>
</xsl:if>
<td class="section-data">CppUnit <xsl:value-of select="FailureType"/></td>
<td class="section-data"><xsl:value-of select="Name"/></td>
</tr>
</xsl:template>
Detailed Informaton
First add "call-template"
<xsl:call-template name="cppunittestdetail">
<xsl:with-param name="detailnodes" select="$cppunit.failed.list"/>
</xsl:call-template>
<xsl:call-template name="junittestdetail">
<xsl:with-param name="detailnodes" select="//testsuite/testcase[.//error]"/>
</xsl:call-template>
Then add template before "<!-- JUnit Test Errors And Failures Detail Template -->"
<xsl:template name="cppunittestdetail">
<xsl:param name="detailnodes"/>
<xsl:for-each select="$detailnodes">
<tr><td class="section-data">CppTest:</td><td class="section-data"><xsl:value-of select="Name"/></td></tr>
<tr><td class="section-data">Type:</td><td class="section-data"><xsl:value-of select="FailureType"/></td></tr>
<tr><td class="section-data">Message:</td><td class="section-data"><pre style="font-size=120%"><xsl:value-of select="Message"/></pre></td></tr>
<xsl:if test="count(Location) > 0">
<tr>
<td></td>
<td class="section-error">
<pre><xsl:value-of select="Location/File"/>: Line <xsl:value-of select="Location/Line"/></pre>
</td>
</tr>
</xsl:if>
<tr><td colspan="2"><hr size="1" width="100%" color="#888888"/></td></tr>
</xsl:for-each>
</xsl:template>
If you done all rigth - Now it should all work.
Modified file you can find in attaches - unittests.xsl, all this inderts marked by (DEmon) 
ToDo
- Start using cppunit2junit.xsl transformation from CppUnit package at Dashboard. If someone could help... please do it. I'm not ASP.net developer.
- Learn NUnit plugin and create "tidy" plugin for CppUnit.
