Unexplained drop of data services
I'm updating my own post.
The day before 3.0 came out. I noticed I had no texting capability. A check of the ATT website showed I no longer had a data plan either. I was always in range of a wifi signal - so I didn't notice that ATT wasn't delivering data either.
Yesterday, I talked to a human at ATT. He was unable to add the data service back in, and suggested I wait for the new 3GS he knew I had ordered.
Today, I thought. BS. And called again. This time I got someone who knew how to add the data plan and text message back in. I'm back in business.
I've updated my 1st generation iPhone without a problem. My new 3Gs appears to be in Alaska at present. I expect to see it in a day or two. Hopefully, ATT will have its ducks in a row for the masses.
Take away message: If the first person can't help you. Try someone else.