I have tried Second
Interoperability is emerging as a key goal of the nascent virtual world industry, which attracting hundreds of millions of dollars in investment on the hopes that video-game graphics and rich 3-D environments will supplant flat Web pages.
I am not sure how fast the web will be replaced by virtual worlds, but who knows, since Social computing has now grown up and entered the enterprise maybe the online virtual office is next, and it would be nice to be able to have one persona, and be able to leave the virtual office for a virtual meeting I am still not sold on the whole thing, I think for now I will just focus on building the Lotus Connections environment. Second Life, IBM in open borders for virtual worlds