Setting your alarm for a time that other Vita owners must also wake up will enable a multiplayer mode. Perhaps your on-time waking performance will contribute to some PSN trophies? That should provide added motivation to wake up on time, right?
Paint Park is yet another free app for Vita, coming April 18th (that's tomorrow!). Essentially Microsoft Paint for Vita, the app will also let you take photos with the camera and edit them by carefully drawing mustaches on the subjects. Unfortunately, this is not a Vita port of Draw Something.
Finally, the last free app announced by Sony is Treasure Park. This app lets you create your own puzzles and share them via Near. Treasure Park is also coming in the "summer."