Or Byousoku 5 Centimeter in Japanese. Trailer is here http://5cm.yahoo.co.jp/
Love the music in it. Comes out early 2007. It contains 3 short movies.
If you don't know already, it is Makoto Shinkai's new work. If you aren't familiar with him look up Voices Of A Distant Star and The Place Promised in Our Early Days.
Ever since I watched Voices Of A Distant Star I've been a fan of his work. Beautiful animation&art. His story is...how to put it, very human. Dealing with relationship and emotions. Damn it, I have to wait till next year to watch this =/.