While sniffing around for frostitute usages yesterday I stumbled across lingofactory.tribe.net. Wordie is many things to many people, one of which is a neological playground. In that sense it shares a common mission with lingofactory: to seed the world with madeupical words.
One notable difference is that lingofactory has a “publish or perish” policy: non-particating lurkers are subject to eviction. Wordie will never be so harsh, but I have to say, I admire their ruthlessness.