iPod touch How To Get Documents onto Touch?

I'm now really considering purchasing an iPod Touch but before I do need to ask how I can get my documents onto the touch?

This feature would drive my straight to buying one since I always need a long list of PDF's, Pages, Doc Files and more on the go. Some for college to show professors, important docs, but mainly PDF's of books to read.

I know the touch isn't Amazon's Kindle but I don't think i'll mind...

...so how can I get my documents onto the Touch? I remember seeing the touch commercial with a PDF being downloaded from an email....iono...

aweosme! (awesome*)

and free too! i just downloaded it even though i haven't purchased a touch yet, but ill be prepared! thanks!