It seems pretty obvious that C# and VB are the preferred language options for SDK. We recently missed a deal, and we believe the primary factor was Laserfiche's lack of robust J2EE support compared to it's .NET offering. Our primary competitors on that opportunity, OnBase and Alfresco, seemed to offer more robust Java functionality.
We have an active opportunity that will likely be made or broken based on how accepting they are of the JRA functionality. For this current opportunity, I am highlighting the advantages of the Workflow Web Service to make up for the fact that the Workflow SDK did not ship with additional Java support. This particular prospect plans to build Laserfiche in to an application being built entirely in J2EE. They don't want their end users to see the Laserfiche front end client at all, if possible. This is much more doable with the broad .NET support, but I'm just not certain with J2EE.
Are there plans to expand the Java SDK? It seems like .NET gets all of the love these days.