If you are only interested in using it for your own computer....
I liked PdaNet. It is a nice WiFi tether app. It does require installing interface software on your pc also. It is also free and the USB connection charges your phone while you are connected. Support is good also.
PdaNet *can* "Wifi" tether over a bluetooth connection.
2.2 update =0, 1.1ghz ULVChevyNo1 7slot, setcpu on demand, wifi tether. 196 on a short benchmark, I can't complain too much!
I use Barnacle Tether, its very easy to use, I've impressed friends by connecting to their iPhones when they have no service at all. I tried WiFi Tether and just couldn't figure it out. Just wouldnt work right for me.
I've got Wifi Tether and Barnacle Tether and I can't get either of them to work. My computer finds them and it says it's connected but that there is no internet connection... Can anyone help me and tell me why it won't work?