This looks like to just want to create hype around something that is nothing yet by carefully placing big names all over the place. too much focus on "famous" investors and founders.
Looks like that to me too. On the other hand it is a smart move if you are a famous founder and have those famous investors, regardless if your product is any good or not.
i just had a look at their homepage (in slick 3D). My initial reaction was--ok these guy are attempting what Linden Lab was trying to do with Second Life-in-the-enterprise (a project that LL eliminated about two years ago, but which showed promise for a while as evidenced by IBM's sponsorship); in other words, a virtual workplace rather video-conferencing (eg., gotomeeting.com). But then reading the typically perceptive and relentlessly skeptical comments from the HN community pretty quickly convinced me that my interpretation was a little over-extended to say the least, but as a former Linden, probably inevitable.