I'm new to the G1 but got the hang of it really quick, I just transferred from the Samsung Impression. On the Impression I had free Internet and I tried it for the G1 and it worked! (You must be on T-Mobile!!)
1) Change your APN settings to this
(Menu -> Settings -> Wireless Controls -> Mobile Networks -> Access Point Names -> T-Mobile US)
-Name: T-Mobile US
-Username: not set (delete everything in this field)
-Password: not set (delete all here too)
-Server: not set (delete the *)
-MMS Proxy: 216.155.165.050
-MMS Port: 8080
-APN type: not set
3)Open up Browser and go to http://jaghax.org/tmobilex/
4)Bookmark it and begin searching.
Credits: TeleNubby (http://www.samsung-behold.com/samsun...ges/?topicseen)
Any problems?? Ask me!