I don't know what Du mean Von Du missed the first konzert but Miku is prforming Live at Nokia Theater at AnimeExpo in L.A. on July 2, 2011 and as far as I know this is the first she's been in America. it'll be like 39's Tag so Len, Rin, and Luka will be there too I think.
There are no plans to bring her to the U.S. at any time in the future. Which is a shame. The San Francisco Zeigen was only a Wird angezeigt of the film and as such was not really a concert. Of the concerts put on, the one Von Sega is the best. It's the one most shown with The World Is Mine with the transparent screen.I was hoping she'd Zeigen up at the Comic Con last Jahr oder this year, but so far nothing.