I always loved the look of the PSP Go's clock face when in closed mode. And it looks like Vita is getting something similar among those free apps announced earlier. Judging by this video, not only do we get a range of clock faces to turn the Vita into a rather expensive alarm clock, but you can also interact with friend's and their Vitas.
Called Wake up Club, you can set alarms, send messages between friends and there are a few mini games thrown in there too.
UPDATE: Seen people posting trophies for this, so there could be some neat stuff lurking within those games.