The common ground between Jenkins and xUnit.net is that they both have support for NUnit's XML format.
Add a build step to your Jenkins configuration that calls the xunit console runner like so: xunit.console.exe tests.dll /nunit test_report.xml
Then add an NUnit plugin (or the generic xunit one) and point it to your nunit-format report file.
** disclaimer: Jenkins was still called Hudson last time I used it, and I've never used xUnit.net, so this may be inaccurate.