That or pay the $19 for the full version after the trial of PDAnet and use that with your Droid. You can try it out and if it isn't fast enough then just don't buy the license and stick with your home connection. If you find it fast enough, then go with PDAnet and rock on.
Really personal preference. I would at least try it out and see how PDAnet works for you. You might find it to do what you want.
Also, if you get a Droid or an Incredible, get shape writer. Sweet text/typing program.