I ordered my SNES PowerPak last week. I'm hopping it gets shipped soon as I haven't heard anything from RetroZone yet.
Also I have I like 3-5 SNES consoles around here somewhere so we'll see if I have any problems on them. I still need to get a CF card though.
I read this entire thread and I feel unsure of whether the PowerPak is going to give me headaches or not...