From the README
Navvy is a simple Ruby background job processor inspired by delayed_job, but aiming for database agnosticism. Currently Navvy supports ActiveRecord, MongoMapper, Sequel and DataMapper but it’s extremely easy to write an adapter for your favorite ORM. Besides plain Ruby (1.8 & 1.9) it completely supports Rails Edge.
Navvy gets an endorsement from Mr. MongoMapper @jnunemaker in upcoming episode 0.1.2.
We’re looking forward to Monitor, the planned web UI to Navvy.