SCEE has registered two PSVita trademarks along with the name PlayStation Vita in Europe.
The filed trademarks were discovered on Neogaf (via Europa.eu). The names were filed today, confirming the rumored name of the Sony NGP which was revealed back in January.
Expect Sony to give the new handheld a proper reveal at its E3 press conference tonight at 8:00pm ETS (5:00pm PST). Stay tuned for more details.

ps vita avalible fall 2011
wi-fi model, 250 usd
wi-fi and 3g model, 300 usd
but unless you live in japan you might not need 3g internet right away