Finally watched Being John Malkovich and The Truman Show this weekend. For almost fifteen years I've been urged by friends and family to see these, and having finally gotten around to it, I can see what all the urging was about. Man, the strangest stuff happens down on 30A.
If you want the full low-down on them, click on the above links and see their respective Wikipedia pages. Much has been written about each, and I won't try to tack on to it here. I will give a bottom line rating for each though: 3/4 stars for Malkovich, and 4/4 stars for Truman.
Final note: Probably not best to watch both back-to-back.