I've rooted my Droid Incredible and installed both the "Wireless Tether" and "Barnacle Wifi Tether" apps but I can't seem to get internet connectivity on any other devices. I can see the connection on my laptop and on my iPad and my devices get ip addresses assigned to them but I can't connect to the internet. Google Chrome reports "Name unresolved" while Safari on the iPad only states that the device isn't connected to the internet. Why isn't this working?
Did you download Wireless Tether from the Market or from http://code.google.com/p/android-wifi-tether/ ?
If you are running Android 2.1 you need to take the extra steps listed here: http://code.google.com/p/android-wifi-tether/wiki/Setup_HTC_Desire_Incredible
If you are running 2.2 then in theory it should just work.
I would first try the latest release candidate here: http://code.google.com/p/android-wifi-tether/downloads/detail?name=wireless_tether_2_0_5-RC2.apk&can=2&q=
Let me know how it works out.