I have had many conversations at this point with Cingular to try to get my 3rd party apps to work. They have all been unsucessful.
I am always told that adding additional access above their browser will force me to incur additional charges!
This
http://www.mobilewhack.com/how_to_hack_t-mobile.html post is about how I feel and my current course of action.
It was working last month (Verichat, FeedBurner, etc) and so was the ispda.cingular and wap.cingular APNs. Now nothign works.
I am a non-BES user with a 7290 on Cingular, it has been very frustrating.
Thanks,