I'd price out wireless stuff too. The lack of hassle might be worth the cost for you.
While an interesting thought, I'm not interested in making the entire network wireless. There are simply too many machines to justify the cost and I prefer a wired network for large file transfers (I sometimes move ISO and Norton Ghost images across the network).
For the one or two laptops I have, that might be an option, but nearly all of my machines are desktops or servers and they usually don't move once placed.