Seth Grimes has written an interesting article - "The Developing Text Mining Market" in which he differentiates between text mining "technologies" and "solutions".  SQL Server 2005 has the text mining technology built in for anyone motivated enough to create the solutions that will feed this market.  Peter Kim has written a tutorial on how to do text-based classification using Integration Services and Data Mining.  This should give any entrepenuers enough meat to get started building text-mining applications.