http://www.sqlservercentral.com/blogs/andy_warren/2008/07/29/rebuilding-stats-twice-or-not-at-all-posted-on-ssc/

Rebuilding Stats: Twice or Not at All Posted on SSC

By Andy Warren, 2008/07/29

Rebuilding Stats was published yesterday on SSC, some nice comments posted to it as well. The main point of the article was that if you're rebuilding indexes with the default options you're automatically getting stats update on those columns as well.