Knuth is so revered among computer scientists that they won't cash his checks.
futilitycloset.com
futilitycloset.com
[Edit: Nevermind, found the contact link.]
P.S. Knuth is old news.
Dr. Knuth has a sense of humor...
In any case, does that apply to the cheque on the wiki article?
Stupidity: Cashing that $2.56 check you got.
In any event I wouldn't cash a check like that, it's a nice keepsake.