Database setup/design for multiple services
good lord, no.


read up on multi-tenancy http://msdn.microsoft.com/en-us/library/aa479086.aspx
read up on the Party Model http://www.tdan.com/view-articles/5014/
read up on Table Inheritance  http://www.martinfowler.com/eaaCatalog/singleTableInheritance.html


Then go read the data modeling books by Fowler, Silverston, or Hay.