Anyone who understands the licening model of MOSS put your hand up.
If not try here - http://office.microsoft.com/en-us/sharepointserver/HA101655351033.aspx
- as a side note to this, I've heard different opinions on what determines standard and/or enterprise CAL's. Some suggest if you have an enterprise server then you must have enterprise CAL's. Others suggest the honesty system applies to what features the user is actually accessing. The FAQ suggests the later.
Not sure of the features of MOSS and which licensing model they fit in, try here - http://office.microsoft.com/en-us/sharepointtechnology/FX101758691033.aspx