Right after i got the text message about having to download a new browser my i500SMS program quit working? Could it be related?
No, not related. Furthermore, receiving a textmsg doesn't involve I500SMS.

I get a message when i send a text message:

message failed, please reauthencicate using Enable SMS application?

I disabled the i500sms program then reset the phone and then enabled it and reset the phone and it still doesnt work?
But did you re-authenticate ?
Click on Enable I500SMS, then No to not go to Messages app, then enter a new PDAApps Proxy password (make one up)...

I think i just hot sync'd and installed the new browser but when i look at my phone menu "blazer" is still there? Installing a new browser doesn't delete Blazer. The new browser is NWEB. You cannot delete Blazer.