I love seersucker. I wear it just about weekly during the season. In fact, I wore my jacket yesterday, and I got at least one compliment on it from a random person. That said, I'm with Gib - I own the suit, but I wear it as separates. I just can't bring myself to wear the whole deal. I've seen the full suit done very well, but I just don't feel like I could pull it off.
Also +1 to lawyerdad. A lined seersucker jacket makes no sense to me.