If you're adventurous, you can pick up a LG Chocolate or Motorola RAZR e815 or v3c (not v3m unless you're willing to disable the v3m's memory slot) and modify it so that EV-DO tethering works. You will need the VCAST addon, which costs $15/month.

I've been tethering with VZ for ages. I would not recommend it, however, as it requires a willingness to modify your firmware, risk your warranty, and in general be a bit of a hacker. Bear in mind VZ does not support J2ME applications, and some VERY NICE apps (such as the various Google clients) won't run.

If I didn't have VZW, I probably wouldn't need my 770 =/