I've used Jenkins in the past (and still do) for the existing QTP tests that we have. I've not been really successful porting over the TC scripts to Jenkins. One upside that I've seen is that I can run the entire project (instead of a batch job in Jenkins) or I can run each individual test.
One downside is that I *think* that you need one .bat script for each think you want to run from TC (see above for batch and/or each test). Would be really great if you could pass parameters on the command-line to TC. Again, I'm probably wrong, I haven't had much time to look at it. When I get a better handle on TC, I will absolutely be using Jenkins.