bear in mind that if Uverse turns out to be crappy for you, you can't go back to dsl anymore..
if nothing is wrong with your dsl, I would stick with it for now. what speed package do you have now?
if you need more speed, I would rather suggest Comcast and swallow the slightly higher price making sure the service would be at par. Comcast at least gives out a little better tech support and customer service than ATT.
I had dsl before also and when they started metering internet, I jumped to Comcast Biz. Price is slightly higher but I get way better service overall.
going back to your question, timcuth
is correct, key in your address or phone number and it should tell you if it's available.