I got in on the Buy.com "price mistake of the day" deal for the MR314 + the MA401 pc card. I switched from a SMC7004abr and within minutes had the system running. So far, in terms of online games, I've not seen the "5 second lag every minute" thing that another guy mentioned, but then I'm only using the wired port for gaming as my laptop is too slow for games.
I'm happy with the switch to the MR314, online gaming is still the same (which is good since I was happy with the SMC), the transfer speed is slightly faster, and my laptop can now be used anywhere in the house.