I've made some additions and alterations in order for delayed_job to be ran on TravisCI ( http://travis-ci.org/ ).
All that is required is a new service hook being created ( http://about.travis-ci.org/docs/user/getting-started/ ) for the project.
You can also change the ruby selection and update notification preferences using the .travis.yml file ( http://about.travis-ci.org/docs/user/build-configuration/ )
There appears to be an issue with 3.1 activerecord and ruby 1.9.2 ( most likely YAML based) : http://travis-ci.org/#!/chrisharper/delayed_job/builds/88921
P.S I have created a picture of me in a monkey suit to persuade you :
Add travis support
After applying the pull request here :#46
It fixes the 3.1 issues on 1.8.7 and rbx : http://travis-ci.org/#!/chrisharper/delayed_job/builds/88948
Jruby with 3.1 seems to still be affected.