I know it is just anecdotal, but we have the same exact router in our house.
We have 2 White 17" C2D Intel iMacs, 1 Alu 20" C2D Intel iMac, 1 C2D Mac mini, 1 G4 Mac mini (wired, which shares an 802.11G connection to the AppleTV, Wii and 5 iPod touch through the built-in Airport) all running through the router.
We have
This Drive attached to the router and have not had a single issue. Each computer has their own space and we share a common space.
I routinely recommend the router based on my experience with it. I wish you were having a better experience with it!