We'd already had some indication that Dell's Mini 9 and Mini 12 netbooks were headed to AT&T stores, and it now looks like those and a few more are now finally available from the carrier -- in Atlanta and Philadelphia, at least. From the looks of it, Atlanta is the real test bed for the trial, with customers there now able to snag netbooks with built-in 3G at prices "starting at $49.99," assuming they also sign up for AT&T's "Internet at Home and On the Go" broadband bundle, of course, which itself starts at $60 a month for a 200 MB per month mobile data plan and basic DSL service. AT&T only goes so far as to say that it's offering "similar mini laptop promotional r
