I have 5.
GMail#1: Only used for signing up for sites that lead to Spam.
GMail#2: For professional use.
GMail#3: Only given to people.
College: Obviously for school stuff.
Blackberry: Only given to close friends and family
1 for personal
1 for Crackberry that is forwarded to above
1 is my blackberry address that i am starting to use for more official things (lining up speakers for school, etc....)