This community call is a bit old (Jan 09) but just in case you never noticed, here are the posts/links to cast your vote on the new feature you may want to have in the next version of EntLib.
http://blogs.msdn.com/agile/archive/2009/01/26/enterprise-library-5-what-s-on-your-wish-list.aspx#comments
And this:
http://blogs.msdn.com/agile/archive/2009/03/27/enterprise-library-5-0-tentative-product-backlog-published-story-feature-prioritization-is-open-your-participation-is-invited.aspx
You can find more info in the patterns & practices portal and in codeplex.