After a week of trying to get my new treo 300 to go online, one tech support person at the "wireless web tech support level 1" was finally able to tell me what the problem is...

wireless web does not work when "automatic network time" is disabled

(or at least you can't "update your settings" when that's disabled)

I was on the phone with sprint at least 10 times and was told to "wait 24 hours" at least 5 times and told about different problems on their servers etc. etc. Finally it was a stupid little checkbox on my treo.

Thought this might help someone some day.