As the company has done in the past, Sony have opened up lines of enquiry for their Japanese customers to comment on what PlayStation Vita peripherals they want.
Unsurprisingly, the add-on that is in the front running is the UMD Drive, but it is followed closely by a docking cradle with HDMI out, a compact QWERTY keyboard, and a grip battery unit.
Sony have also previously asked what non-gaming related apps that potential users will want, and those results will be released at a later date. If you want to voice an opinion, then head over here but beware it is in Japanese.
You can preorder the PS Vita from ShopTo in the WiFi and 3G formats