There was a plank computer post here last couple of days. It showed an atomic sized computer performing one crack attempt every 10^-44 seconds would take a 95 character alphabet 100 years to crack a 121 character password.
Monkeys take up 1m^3. 10^105 bigger than a plank length. Typing 120wpm is 10^43 slower. Ignoring punctuation and spaces and capitalization, a 26 character alphabet allows for about 52 more characters than a 95 character alphabet.
Bottom line, monkeys can't come anywhere close to being able to crack a 100 character password from a 26 character alphabet.
They missed demoing it working with hockey stick guy harassing it.
I think the skills are pretty cool though.