Metaplace opened today. I haven't joined it.
My big problem is that between Second Life and Real Life, I really don't have the time to dabble in yet another virtual world. My previous jaunts in MeetMe, Twinity, There, and HiPiHi were short lived partly for the same reason.
I know if I create a Metaplace account, I'll use it for a week (at most) and then drop it. I'm saving myself the energy and time by not bothering.