There were rumors going around not long ago about more subsidized netbooks making their way over to AT&T. Well, it looks like AT&T is about to start offering the Acer Aspire One 10.1″ netbook complete with integrated AT&T 3G access via a partnership with Costco. Costco employees are currently being trained for the launch and according to the info we received, the preparation comes to a head on May 8th. As for the netbook itself, it will become availble beginning May 11th. We’re pretty sure the Acers will be available from both AT&T retail stores and Costco electronics kiosks, just like Radio Shack’s current AT&T netbook. No word yet on pricing but look for it to line up just above the 8.9″ model currently available from Radio Shack.