Check jaunty-backports first, if not there's probably a PPA. Of course wtih a PPA it's essentially unverified and not security patch supported. I really wish there was more of a "auto-backports" service for the most popular distros - basically like doing a nightly build of upstream except it's a package. And of course untested and unsupported in every way.
"It ain't so much the things we don't know that get us in trouble. It's the things we know that ain't so." -- Artemus Ward aka Charles Farrar Brown