It's not official just yet, so don't go Google Imaging it until we say so. It'll be a follow-on from the Aspire One D250, and will dualboot both Android and Windows.
Acer's mobile product manager Martino Mombrini let it slip yesterday to Electricpig, saying that the chassis of the D260 dualbook would be redesigned so it won't look too similar to the D260. Also—as they've boasted countless times before—they took the opportunity to mouth off again about how they're wanting to launch a Chrome OS netbook, with a Q3 release date "likely." [Electricpig]