Serving as a nice reminder that PlayStation Mobile games exist, Sony has initiated a promotion that offers a free game once per week for six weeks. The first title, Samurai Beatdown, is on the house right now for PlayStation Vita and certified mobile devices. It's a slash-heavy game with rhythm elements, but don't go in expecting Rhythm Heaven here.
Each Wednesday for the duration of this event, there will be a new PS Mobile game offered. The remaining five have not yet been announced, but I'm sure you have some ideas concerning what you'd like to see included. Fingers crossed for Super Crate Box and/or Aqua Kitty.