Why is Siri Assistant no longer working on my 3gs?

I downloaded and used Siri Assistant on my iPhone 3gs for about a year. Loved it. Now, the app still starts, but continually says there is no network connection available? Has Apple stopped supporting the stand alone version just because they have now included it in the 4gs?

Also, does the 4gs have file send capability via Bluetooth yet, and if not, what are we supposed to do with synching our contact and phone information into our Prius?

Only way I have found so far is to copy my Outlook contact list into my old Sony Ericson phone and synch it with the Prius. That worked from day one, and sure beats the heck out of trying to enter each and every contact one key at a time.