Via NBP Tracker, you can vote on line for the NPB All Star game(s) here.
And speaking of the All Star Games, BBM released information on their website today about this year's edition of their annual All Star set. The 65 card box set will be released in July. It contains cards of each player on the rosters of the teams (28 on each league's team) plus cards of the manager and coaches (3 for each team). It also contains a card for the player who received the most votes as well as the MVPs from the two games from 2008 (Takeshi Yamasaki and Masahiro Araki). The webpage does not yet show what the cards will look like - I'm hoping that they're an improvement over last year's set.