Mine has problems connecting, or defaulting, to my home wireless network. Most of the browsing, actually all my web browsing to date has been over the Edge network. I set up the wireless correctly and it is "checked " as my preferred network, but the phone never defaults when browsing or checking e-mail.
The wireless router is D-link 802.11g/2.4 GHz. Next I'm gonna try my airport base station and see what happens.
Yes, a few of us have reported similar problems. There is a thread here discussing this. Some have success by resetting the network settings while don't . I'm having the same problem as you are.