I\'m going to be doing a talk at Code Camp in Philly soon on Continuous Integration. I have no experience with lava lamps, ambient orbs, or whatever - but I think that would be
There is an Nabaztag Plugin for Hudson and Nabaztag is IMO the easiest solution.
For Lava Lamps, you'll need a bit of stuff as detailed in Hudson Build Status Lava Lamps but it seems pretty easy.
Finally, you might want to check the DIYOrb entry on Kohsuke's blog.