We've seen the new Android-based XPERIA X10 from Sony Ericsson at a fast pace and a snail's pace, but have we ever seen it so stunningly middle of the road? We just got a chance to play with the phone in person for the second time, and from our random sampling of three or four different handsets, it seems that performance is very contingent upon how much content is loaded into the device and what particular thing it's trying to perform. Sometimes we'd fly through the stacks of faces, while other times we'd sit there waiting for the simplest thumbnails to load up. The good news is that we have u