Just been pulling my hair out for 1.5 hours over a new wireless router install which supposed to be a no brainer to install ...
I had a similar experience, but the solution turned out to be MUCH more complex. I have another building on the property about 400ft from my office, to which I needed connectivity. I didn't want to spend the time and money to dig a trench and install the conduit, cabling, and repeaters needed to bring 100Mbit Ethernet to that building.
I selected a Buffalo 802.11g router with a unidirectional antenna at both sites, and I have basically line-of-site transmission. I selected 802.11g because of the higher transmission speed and range, and the Buffalo stuff seemed the best from my spending the last 2 years revisiting this issue. The throughput is great, but the setup would have been impossible without spending about 2 hours on the phone with a Buffalo tech rep. My routers were new models, and their setup documentation "sucked" at best.