I have done a short sprint the last three days on my NLP SaaS kbsportal.com mostly working on classification/tagging.
When I have time in the next month I also make some improvements in sentiment analysis and entity recognition. The text summarization code also needs work but it may be a while before I have more time to work on that.
I rewrote KBSportal in Clojure early this year. It used to be a pile of Common Lisp, Scheme, and Java code experiments written over a 10+ year period and it was great to pull just the parts I wanted into a new system. It might be heresy to Lisp programmers but I will (probably) eventually rewrite it again in plain old Java to save a bit on memory footprint and CPU time. Clojure is a very efficient language but not as efficient as Java.