Second Google Unlife

[Raph]

I would expect pretty much every platform to load SketchUp format models soon. (We certainly plan on it). The 3d warehouse is a great thing.

That said, that's not the only format to think about. Lots of stuff out there. That's why we want to just load as many formats as possible.

[Endie]

Multiverse is cool, useful, and surprisingly easy to use if you are comfortable with programming.  I played around with it a while back and found it fun and easy, and indeed got enquiries from not one but two companies in the virtual worlds sphere as to whether I was interested in a job off the back of my posts.

Adding items to a world is pretty smooth and relatively easy.  It is, however, a long way away from being drag-and-drop when it comes to dictating behaviour.  And since you're having to install and run your own server etc, actually getting going takes a modicum of command-line work.