Two words of advice when setting up a wireless network:

Buy Belkin.

I had one of their 802.11b wireless routers, and the other day changed up to the "Pre-N" MIMO router (the one with three antennas). The damn thing's "installer wizard" even has a version for Mac OS9!

I ran the wizard, and except for one hiccup (which only required repeating one step) and I was up and running - in seven minutes.

We have a 3,000+ square-foot house, which is L-shaped to boot, and this new router transmits a usable signal into every single part of it, even though the router is off in the ell in my office. Works even in the basement, all rooms upstairs, outside in the screen porch, everywhere.

And that's with an 802.11b card in the old Powerbook. (Second plug: It's an AeroCard from MacSense. Helluva product as well.)

Disclaimer: I have NO relationship with Belkin except as a satisfied customer.

Redstone

about a month ago. Installed easily with no problems until I connected my VOIP phone. Could receive but not send. Called Belkin support-in India of course- was told to I needed to manually configure virtual IP for phone ports. Got port info from Packet8 and started. Every time tried to enter data I got a WAN error.
Tried to call support for 2 days-wade through the options, pushed 1 for tech and phone would go dead-no music, no please wait, no nothing. Got disgusted and took it out. Went and bought Netgear wireless router. Installed easily, connected VOIP-no problem-did it automatically.
Found out later that other people aslo had VOIP problems with Belkin routers. 3 of my friends experienced same difficulties-all no use Netgear of D-Link.