|Don't need to spend too much time on the pros if you have a wireless home lan already set up !|
About Cons, I've just found out, pretty much by accident, using Sisoft Sandra 2001, that the Wireless USB adapters (I tried DLink and Addtron, but others should be the same) knock out about 22% (633 down to 493) of your CPU and 33% (233 down to 156) of your FPU power when they're plugged in !
That's a pretty heavy payload but fairly consistent with what I've been reading about USB adapters elsewhere.
It's not the end of the world and there's enough power left to stream mp3s or play real video streams and light browsing, which is my primary use.
I'm thinking that a miniPCI wireless ethernet adpater wouldn't use up as much CPU/FPU, but they need to be released to the general public and not only to OEMS. eCost seems (no details are given) to have a Toshiba one, but it's $179 vs $119 for a USB adapter...