you can turn A630's bluetooth on to make as dial-up modem. Connect to laptop via bluetooth. It's pretty slow since it doesn't have EDGE. It use GPRS is more like average 11 kbps download and 8 kbps upload.
I have Nokia 6620. It has fancy bluetooth and EDGE. I test on my Powerbook 12". It goes like 113 kbps download and 98 kbps upload. that's fastest than I had experience with old sidekick. Which I am satisfactory with EDGE since I can make real-time communication on AIM as I notice on sidekick that appear horrible delay of time on the communication. I was confused what were talk about. lol.
What wonderful I can do is.. go on travel .. anywhere! I brought it under Cingular with unlimited Media net for $19.99 plus voice blah blah.