Legomania

They featured this on The Screen Savers last Friday, and it's really something to behold. Basically, it's online Legos. I played it for about an hour last night with a friend of mine, and damned if it isn't addictive.
It should be mentioned that it's in VERY early stages right now, but it does seem to be fully playable. Normally, anyone can destroy anyone else's blocks, which leads to griefing...but the game is highly moddable already, and many people have custom scripts that reportedly fix it. Also there's no normal way to save your work, which can be a big downfall...but there's serious potential for fun here.
It should be mentioned that it's in VERY early stages right now, but it does seem to be fully playable. Normally, anyone can destroy anyone else's blocks, which leads to griefing...but the game is highly moddable already, and many people have custom scripts that reportedly fix it. Also there's no normal way to save your work, which can be a big downfall...but there's serious potential for fun here.