WoW + Second Life Crossover Event?

While browsing the latest WoW news today, I stumbled across this tidbit of info; A faction of players from two of the most popular online games, WoW and Second Life, are apparently planning some sort of unofficial crossover event, to take place in late July, according to this blog posting. No solid details are given on exactly what the event is or how it's to take place, but I'm just curious as to how such an event could happen. Players from one game meeting up in the other, and vice-versa? Ok, fine...but doesn't sound all that sexy right off the bat. Then again, there could be something actually cool going on here that I'm just completely unaware of....it happens. I'll keep my ears open...