Thomas Munro has hacked up a prototype of application testing automatically if patches submitted apply and build: http://commitfest.cputube.org/
I would recommend have a look at it from time to time if you are a patch author (or a reviewer) as any failure may say that your patch has rotten over time and needs a rebase. It is good to keep the commit fest entries build-clean at least for testers. Thanks,
This looks very interesting. But when I click on a "build: failing" icon, it takes me to a generic page, not one describing how that specific build is failing.