It was expensive, but that's why I went ahead and got the Wireless G type. It's suposed to become the more widely available type in the future.
All together, with network cards for 5 computers and a wireless G router, it was around 500 dollars. The good news is that we'll get 50 dollars back in rebates. Rather than spending 300 now and having to upgrade in a few years, I went ahead and got the more expensive type.
I hope that makes sense