It's seems sorta random. Since the new patch (1.0.3) I can only seem to get into SL part of the time. When it doesn't let me in, it usually says that the servers may be down, but the first time it happened I KNOW the server wasn't down, because I missed a meeting due to it. It always stops at "Verifying Protocol Version."
Windows XP
512MB DDR RAM
GeForce4 MX420 (updated drivers, w/ attached shoulders)
Something else goes here, but I can't remember what....
Anyway, SL is being mean, Make it stop!!!!!