I don't know what tu mean por tu missed the first concierto 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 día 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 mostrar was only a mostrando of the film and as such was not really a concert. Of the concerts put on, the one por Sega is the best. It's the one most shown with The World Is Mine with the transparent screen.I was hoping she'd mostrar up at the Comic Con last año o this year, but so far nothing.