Update: Today while I was running errands over my lunch break, I stopped in at Costco and saw a sweet deal on a D-Link Pre-N router with Rangebooster. It was $75, and I priced high-gain antennas for my existing WRT54GS for about $50. So, I figured I'd give it a shot.
Well, big mistake - first off, I had to move my cable modem out of my basement and back upstairs next to the router in order to get it to see the presence of my modem. Then, come to find out, the D-Link had crappier antennas than the Linksys. So, in effect, it's range was shorter than the existing WRT54G. Guess what's going RIGHT back to Costco tomorrow! D-Link's "rangebooster" is complete BUNK IMO.