Not all can do this, but if you want a cheap solution I'd recommend the Linksys 802.11b Access Point, WAP11 v.2.8 (newest version). It is fairly easy to setup, but their are definite quality control issues with Linksys and I find myself swapping out new AP's all the time trying to find one that doesn't need to be power cycled every day.
I haven't tried Netgear's cheaper solutions, but your best bet if you are willing to spend a little bit more money is to go with the Netgear WG302 AP. It has 100mW of power output and it comes with 5dBi diversity Antenna's. They can be bought for $220 shipped from
www.newegg.com.
I know that Buffalo Tech also has their own WDS (wireless distribution system) with their AP's and special repeater mdules, as well as D-Link, but I have no personal experience their, so I can't speak for that.