I bought my Droid just yesterday. The phone itself works fine. 3G and WiFi work with no problems. I can browse the web, use the Gmail app, etc. However, I cannot access the Android Market. When I try I get one of two errors:
"A server error has occurred. Retry, or cancel and return to the previous screen."
"A network error has occurred. Retry, or cancel and return to the previous screen."
So far I've pulled the battery, turned my phone off overnight, performed a factory reset (twice), tried a different Google account, deleted and re-entered my credit card info in Google Checkout, and tried 3G and WiFi together and separately. NOTHING has worked.
Any other ideas? So far my Droid is less useful to me than my two year old Blackberry 8330 was.