Sony's latest firmware update for the PlayStation Vita was released yesterday, but has since been removed due to what the company is calling a technical fault.
http://playstationlifestyle.net/2012/04/02/ps-vita-firmware-update-v1-65-detailed-coming-soon/The minor updates that were to be included in this firmware update are:
• A “Notification Alert” option will be added to Settings, so you can toggle alerts on or off
• “After 10 minutes” will be added to the time options under Power Save Settings
• An Arrow icon will now appear when PS Vita finds new activities in the LiveArea
• Caps Lock will be supported in the On Screen Keyboard