In order to celebrate MikuPa – Hatsune Miku Live Party (concert) which will be held on March 9, 2011, GSC is going to release Nendoroid Plus Hatsune Miku: Spring Version (or also known as Sakura Miku). This cute little spring fairy is only 35mm tall and can be used as a charm. According to the official page, it looks like she would be given away as concert attendants prize.
In any case, for us who live outside Japan, our best bet to get her is try browsing for her on Yahoo Auction Japan … or eBay. ( ╥ ﹏╥)