I don't know much Japanese, but...
1. How many versions "you" are there in Japanese?
Kimi, Temee (long "e"), Onore, Omae, ?Kisama, etc.
How polite are each of these?
Kimi - is usually used if you know each other right? ?^_^?
Omae - is in between polite and rude, but is considered kinda "rough" if a female uses it?
Temee - somewhat rude except if you're yelling at your friend? LOL

Onore - Now this is definitely rude?
?Kisama - is this even used in real life or only in anime? ?^_^?
2. I notice in anime they frequently have the somewhat stuck-up girls/women (often upper class girls) using (-wa) a lot in their speech patterns. People don't talk like this in real life either right? ?^_^?
It's funny how they use the "-wa" speech pattern for the arrogant ojousan anime girls and the polite, upper class girls (ojousans) just about never use it (I've seen a couple of exceptions). I guess they're trying to say that the girl using the "-wa" is somewhat arrogant or in the very least - has a huge amount of confidence in herself?

3. What is the term for a girl that uses "boku" a lot? I heard it once, but I've forgotten the term now.

Asa-sempai in Shuffle is one such girl, but I think her mother (Ama) uses "boku" a lot too. Like mother like daughter I guess.
