victoria82: That's correct, as long as you have a plan with Cingular's MediaNet (if you don't they will charge you data overage). Your Cingular 8125 should be set up already to handle this. Try opening up Internet Explorer Mobile and entering in a URL (i.e.
http://www.pocketpcaddict.com). Your device should automatically connect.
watkinsd: You're absolutely correct. The Cingular 8125 has built in WiFi so you can access the internet without having to use MediaNet. Just watch out that you aren't connecting with GPRS (MediaNet). Your best bet is to remove this connection altogether by going to Start>Settings>Connections Tab>Connections>Manage Existing Connections> and tap and hold down on the connection and deleting it. Make sure you really want to do this or you will have to get this information again if you want to connect to MediaNet.
SayGoDJ:
ICS is one way to go, although I would recommend getting a router down the line since they are inexpensive nowadays and are much eaiser to setup. You can find a tutorial on ICS
here. The Pocket PC will just need to connect directly to the laptop as it would any other access point.
Let me know if you need anything else! Good luck Addicts!
-Tim