Business Logic Service

[Rob Andrew]

Hi All,

I have been asked to write a business logic layer that is to sit upon 
the 'net. This layer is to act as a 'service' and provide it's features 
to a number of consuming clients (Ipad, windows, web, etc). Idea is to 
code this in C# and back it into SQL Server or similar.

I was considering web services, but was wondering whether there are 
other options available these days that might be more in tune with 
varying clients?

Any thoughts?

Thanks,
Rob