Thanks guys, and specifically for pointing me towards that CouchSurfing program. That is essentially what I want to do; a world retreat to gain awareness of the various cultures of the world, not so much a vacation. I'd still like some more information on some great places to visit (specifically in England, Denmark, Sweden, and Italy) and areas that should definitely be avoided, perhaps from a fellow American that's traveled Europe? Thanks again!
EDIT: Also, what are prices like over there? How much does food, transportation, museums, and so forth cost?