My Windows PC can now be quickly USB tethered to my Android 2.1 Dell Streak.
I could have gone Bluetooth, I could have gone WiFi, but I choose to go USB and to use PdaNet.
I selected USB so I would not kill my phones battery. I selected PdaNet because I had used it before and many of the other Tether apps I saw required the phone to be rooted. So far it seems just as fast as my current Charter Cable internet. I just watched a little TV on Hulu, and did some online banking, and checked my email.