I had a Linksys WRT54G V1, was pretty crappy, 10 forwarding ports only, I tried to flash with aftermarket BIOS and let's say it failed, RMA'd it and got a brand new V4.1 WRT54G. 
I'm currently using the one I bought while it came back, a D-Link AirPlus Xtreme-G 624.  It can go up to 108Mbps 
wireless with special adapters!