Should I choose a Yahoo! Small Business account, or a GeoCities account? I'll go with the best idea presented!

Should I choose a Yahoo! Small Business account, or a GeoCities account? I'll go with the best idea presented!
I already have a domain name through Yahoo! Small Business; but I need to know if I can (easily) take that name and use it with a GeoCities account (without having to select a new domain name). Anyone have good advice regarding these two types of accounts? Thanks.