Venkat is a regular speaker at conferences around the world. You might have seen him speak at a Dallas stop of the No Fluff Just Stuff symposium. Venkat has spoken at JavaMUG meetings in the past as well as the Spring Dallas User Group.
If you are in the DFW area come and see Venkat cover a very exciting topic, Groovy. If you want to prepare for the Groovy talk check out aboutGroovy for more info, tutorials, and tons of other good stuff.