It's official: AT&T will give you unlimited text, picture, video and IM messages for $19.99 per month now. That's right, go ahead and text your thumbs off without seeing that surprising overage bill from now on. Want even more? Get all that unlimited messaging plus unlimited Cingular Video and MEdia Net for another $20 ($39.99 per month). If you're a wireless messaging junkie an AT&T subscriber, you're a good as gold now. Umm, AT&T -- stop using "Cingular" to describe your multimedia offerings, mkay?