It all depends on where you live but I think since Eclipse came out they are going to wait until like next year because I mean think back on the previous movies (Twilight 2008, New Moon 2009 and now Eclipse 2010) to me it only make sense to do it around October-November if they are going to do the movie this year or keep the one year one movie thing going
The first one is November 18, 2011 http://funadvice.com/r/bjueddfom The second one is sometime in 2012. http://funadvice.com/r/bjueddfom I wish it would have been in one part. Or at least 2 parts but closer together.. I can't wait to years, that's crazy talk!
I heard it won't be until November 2011. They're going to have it split into two movies so part 2 will be out around November 2012