I actually had to calculate the odds for a homework assignment :)
It was for a thermodynamics class, given 10 billion monkeys doing nothing but typing away randomly one letter a second how long til they get a manuscript of 'hamlet'- the answer (and I may be miremembering a bit) was something like 10^67 times the age of the universe...
Of course if you had 10 billion Todds it would take MUCH longer...