Oh jeez, AT&T, don’t you have enough on your plate? You can’t handle your iPhone customers as it is. TechCrunch says some customers’ voicemails go missing for days or even weeks, you can’t enable MMS because there’s no room for it on your system, and the “faster” 3GS isn’t any faster at all on your network. Now comes word that you’ll be the one providing so-called “connectitivty” for Barnes & Noble’s new ebook reader coming out next year. The result: more congestion for every AT&T customer.