From Gartner: 28 September 2008, Daniel Scholler, 2008 SOA User Survey: Adoption Trends and Characteristics.

It shows a rapid shift away from Java and toward .NET for SOA projects.  The % of organizations surveyed reporting .NET as their primary dev platform for SOA, moved from 29% to 41% from 2006 to 2007.   Java declined from 67% to 23% in that same period. At the same time, “Other” jumps from 4% to 21%.  This probably includes scripting environments and dynamic languages, Ruby, PHP, etc.

http://www.gartner.com/DisplayDocument?id=765720 (registration required)