For the Cingular Blue question (ATT) check this thread out http://blackberryforums.com/viewtopic.php?t=2382
follow the advice and get HTML browser set up, you'll view color pictures, full HTML webpages etc.
As for the Autoanswer question, sorry can't help you there. My best guess it's a phone function, RIM would be the ones to talk to. Again not sure, someone else like Mark might shed some more light to the situation.