I have been a C# developer for a while now and have hear a lot of buzz
about web services.  I would like to try incorporating a web service in
a new application I am developing, but have no clue where to start.  I
have tried checking out the Web Service Factory by Microsoft Patterns &
Practices but its a bit overwhelming.  A couple of key questions I
have:

Is it general practice to separate service roles into separate services
or just include all functionality in one?  For example, if I have a
simple customer, products, and order database set up.  Would I create
different services to operate on customers, orders, and products or
build one service for everything?

Another thing I have noticed is MSSQL Server 2005 has a new thing
called SOAP Endpoints.  To use or not to use?

Any pointers would be greatly appreciated.  Thanks in advance!