Current articles:
The "business idea" versus "business implementation" - Which is more important?
http://blogs.reuters.com/small-business/2011/06/14/note-to-entrepreneurs...
A succinct selection of sources on direct small business assistance, business services and business development services:
MSME Employment as Percent of Total Employment
World Resources Institute, from IFC, 2006
http://earthtrends.wri.org/text/economics-business/variable-2105.html
Original data: http://www.ifc.org/ifcext/sme.nsf/Content/Resources
Business Development Services - A Sector Analysis
Wouter Rijneveld, December 2006
http://knol.google.com/k/business-development-services