How big is a googol?

Haha I really had fun reading this :-). In particular because I read this just after watching this: <a href="http://news.ycombinator.com/item?id=2548484" rel="nofollow">http://news.ycombinator.com/item?id=2548484</a>.

Fun post. Reminds me of my interest in large numbers a few years ago with googolplex, Graham's Number, Ackerman function, TREE(), Busy Beaver...