A patent app for the design of a MID with the Acer name on it turned up a while back. The patent was for the design of the device only and the MID sporting that design is apparently coming next month.
There isn't a lot of info on the MID, but it is expected to run WinMo and some version of the Shell UI from Acer over the top. That's really all we know right now.
I find it hard to get excited over the thought of WinMo on anything. I would like to see a new Android or Chrome MID hit the market though.