In my search for programs for wifi tethering with Android I came across this download site:
http://code.google.com/p/android-wif...n=2&q=NexusOne
I downloaded the file on my computer then transferred it to my phone's SD card.
You will need to install Astro File Manager from marketplace to click on and install the file. You will also need to enable unsecure programs to be installed onto Android. You will be prompted to this if you have not already done so when installing the file.
I have been able to install it but when I click on the program to activate tethering it is not able to tether as of yet.
Maybe some testers will have better luck...