First, I apologize for the spam, and the duplicate from the Wikitech list, so I'll keep it short - We're a Cambridge, MA based firm that's looking to change the world (yay!), and have 2 openings on our development team. We are developing all sorts of extensions for MediaWiki (and SMW!), and are looking to expand our team before our international launch!
And if you have any questions or want further information just send me an email!