Okay, no particular order. VW have been around about 15 years, great worlds have gone due to lack of VC, new ones have popped up and finally - making money and going mainstream. Share you list of VW here for others who may not yet have expored them and feel free to make comments on your experiences.
Also you should look at maidmarian.com. Up until recently basically a MMORPG, but they now have "Club Marian". More of a chat/MU environment. All based on Shockwave. Runs smooth. You can chat, the avatars have some movement commands (Dance, ect) and you can drive a sports car around.
Everyone knows Google has joined the metaverse but I don't see it listed here.....
Lively at http://www.lively.com/html/landing.html
Primitive atm and appears to need us devs to go in and make some purty clothes, furnishings and spaces but I'm sure they have grand plans.
Good luck picking a user name, it appears you'll be competing against the entire g-mail user base!
Hey right back :D
Say, there's a pretty good chance that I can relaunch the OzGate Europe DigitalSpace Traveler site with the help of my good friends at HUMlab (Umeå University, Sweden) Just thought I'd let ya know, keep your fingers crossed!