Believe me, you will be able to find plenty of souveniers!! Try the World of Disney- they have everything. You'll probably want to get key chains or pins for your friends.
i always buy my best friends a "big" present and by big i mean something somewhat expensive...
and then my other friends i'll either get them a keychain and a pic of their fav character or like a little stuffed animal
On my last trip I found little Mickey mints... they were like in an Altoids type container and shaped like mickey etc. I took them to school and my friends went nuts! My friends also like keychains and magnets that they can hang on their mirror or in their locker.
One year I got keychains for my friends and put pictures of their favorite celebrities in them. They all loved it...plus it was inexpensive which meant more money to spend on me!! lol
nsyncraider17-I buy those Mickey mints too and my friends also really loved them!
I usually get larger items for my two best friends and then small items like mickey-shaped pencils, keyrings etc. for my other friends. One of my friends is crazy about those little bunches of Mickey lolly pops so I get some for her every time I visit.