I haven't done any apps yet but have thought about the time lapse one. I didn't know about the stop motion, that'd be cool. It really is pretty amazing value for the money. For a general lens, I'm really liking my SEL28f20, it has a nice field of view for general purpose shots and is pretty quick for low light and bokeh. The one I usually have on it is the 16-70 F4 Zeiss though. It wide enough and has enough zoom for most stuff and feels good on the body. The only downside is it's not as great in low light, but Sony generally seem to be on an F4 kick for these things.
I've been thinking about getting the Rokinon 21mm F1.4 lens that recently got released but I think I've spent enough on lenses for now. I did get an adapter and rock my dad's old Minolta rokkor 50mm. It's a great lens with the camera and has a nice feel to the pictures, perhaps just a bit of haze or blur or something but very pleasing.