A-Rod hit what looked like a home run off the right field foul pole against the Rays today, and it was contested in MLB's first use of instant replay.  After umpires consulted the replay, they upheld the home run call.

http://mlb.mlb.com/news/article.jsp?ymd=20080903&content_id=3412816&vkey=news_mlb&fext=.jsp&c_id=mlb

But watch the clip from the TV broadcast.  The Yankees announcers point out that the ball clearly hits a catwalk in foul territory.