Rock on! Wow, what a difference an adapter makes. The throughput on this is unbelieveable. I didn't all of sudden get mad skillz over the last couple of days, but since upgrading my XBox 360 to a Linksys WGA600N on Friday all of sudden I am ending up with the most points on Call of Duty 4. Four bars, all the time. No drops. All the while my Mac is uploading a gig of pictures. Very impressed with the connection reliability of the WGA600N relative to my old Xbox wireless adapter. I haven't had to touch the configuration once since I installed it.
By the way, for you Mac owners out there... the web-management utility for the WGA600N doesn't work in Safari 3.0, but I did get it to work under Firefox. Still a little disappointed that Linksys doesn't have better Mac support, but once its up and running, its a dream.