.edu and .gov helps PR
Sure a link from .edu and .gov will help PR, but it's no different than having a link from other sites that carries the same PR as those .edu and .gov sites...

Gambling in Second Life
So looks like Linden Lab invited the FBI to check out their online virtual world activities in Second Life. Specifically the FBI are interested in their virtual casinos. Since Linden Dollars do convert to real dollars, it's no different than regular gambling...

/view blog/