By Joanna Stern posted Dec 22nd 2010 4:06PM While Acer wasn't willing to let us power on its forthcoming Android tablets at its press event last month , it looks like the company just doesn't have the same kind of control over its partners or employees. Three videos of what appears to be Acer's 10-inch Android tablet have popped up on YouTube, and not only is the slate powered on, but the footage provides a pretty clear look at some of Acer's custom Android apps. The entire UI looks like it's still in a beta stage and the video itself looks like it is some sort of internal test demo -- don't forget Acer is planning to ship these with Honeycomb in April -- but the company seems to be messing around with gyroscope-based page turns and some unique zoom gestures within the p...