Tomorrow system update v3.30 for the PS Vita will allow you to personalize your Vita's Start and Home screens, system application icons and the system's background music via custom themes. In addition to those awesome new features, there will be improvements to the Trophies and Calendars apps.
The themes will be available to purchase and download from the PlayStation Store. There's a good amount of themes, some of which you can see on EU PlayStation Blog. I personally like the one that looks like scissor-cut felt houses.
The update will also let you set up events with your friends in the Calendar app, and you can send event files from your Calendar to them using Messages or Email. Also, Trophy rarity will be displayed when viewing Trophies on your PS Vita, because bragging rights.
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