Some of his (non-programming) achievements: http://www.the-elite.net/thehall/snap.htm
He has been long one of the very top TopCoder members (for which you need absolutely superior algorithm skills to be ranked that high), I think he has also won ACM finals one year. He is very well known in the problem-solving community.
Another guy I rank very highly is Steve Newman, he also had a rating over 3000 at TopCoder, but he is not competing anymore and has started a startup Writely (acquired by Google) - now Google Docs.
Yes, programming contests aren't everything -- but I can say I've learned almost everything I know about algorithms by competing there. And algorithms are important, if you are not doing just some simple web app.