No idea on electric power. We have two servers, one with a 250 watt power supply and one with a 300 watt. Both servers have 700 volt amp battery backups for power failures.
One server resides at my house and connects over a 768Kbps Internet connection. The forum server sits at my ISP's office on a fractional DS3 connection. As for e-mail, there is no cost at all associated with transferring e-mail. It costs the same to send one to my neighbor as it does to Australia.
As for members, there is no limit that I know of other than disk space. We're still in good shape as far as that goes though.
Jason
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Ford-Diesel.Com Webmaster
2000 F-350 Crew Cab Dually Lariat 6-speed 4x4
Black/Tan 4.10LS Fully-Loaded