As you probably know from my bio, I have:
If all goes well, I will not be coaching the St.George team this fall.
New: There will be tryouts for the ACM contest this fall.
Programming contests are entirely artificial situations, and like most time-limited exams, prove little about a person's skills or (heaven forbid!) value as a computing professional. However, they are a barrel of fun.
Someday I might publish some links to other programming contests. A good place to start is ACM's contest site.