add2Queue: Pass vcs number in

We would like to be able to pass our SVN revision number to the add2Queue url.  like:

http://localhost:8111/httpAuth/action.html?add2Queue=bt2&system.name=build.vcs.number.1&system.value=49

We want to trigger a build on every commit without have to poll the repository constantly.  (svn post-commit hook works well)

I have figured out that I *could* post the http://localhost:8111/runCustomBuild.html with the appropriate modificationId... but that answer seems a little to sketchy.

Thoughts?

-Lance