My experience with wireless at home hasn't been too good. I used a Netgear WAP, and found out that it was giving me access only in that room and the next. I believe that
1. The signals don't bend round corners very easily (like sound waves do)
2. They don't penetrate walls (not too sure about this, I was told so)
3. Signal is broadcast as a "Sphere of influence" from the antenna, by changing the direction of the antenna, you can shift this "sphere"
Totally agree ! I used Wifi mainly for Streaming Video to the PSP. The Video streams flawlessly in 1 room, but as soon as you move to the next, theres constant stutter
If you are going for a Router I suggest the
Linksys WRT54G. Lots of Mods available for this router. To increase range you can also make something like this :
*ebanzai.blogspot.com/2006/04/tech-diy-parabolic-reflectors-wi-fi.html