Hi,
I ran across an article that you may be interested in:
http://www.eetimes.com/showArticle.jhtml?articleID=18901792
titled 'Synching Lucy's lips with TV sound'.
Interesting points:
-some LCD and plasma displays may delay video by 100ms
-30ms delay can be annoying
Is a programmable delay for sound going to be desirable?
S. Baker