Dear Mackel,
As an undergrad I was allowed to shadow a neurosurgery attending in the OR for two weeks, and on two occasions, got to scrub in.
I was only able to go on rounds once, though, and, to tell the truth, even then, standing in the middle of a huge pack of neuro- and vascular-surgery attendings, fellows and residents I was scared. Not of embarassing myself, but of what I could become should I choose this field. Don't get me wrong, 3/4ths of these doctors were wonderful, caring people. But the remaining quarter more than made up my mind to never ever enter a surgical subspecialty.
My point is, to echo carbon klein, if you get to go on rounds, and the surgeon you will work with is a caring, pedogogic sort, it will be a great experience and will, indeed, get your juices flowing. If not, again, as cK said, it will get old (and depressing) fast.
Good luck to you!