I will be presenting at APEXposed 2008, October 29 - 30, at Chicago O'Hare Wyndham. I am going to present on everything Application Express and Web services. You can view the abstract here:
http://www.odtugapextraining.com/presentations.html#IntegratingWebServices
Register for the event here:
http://www.technicalconferencesolutions.com/ODTUG_OPP_registration.html
Hope you can make it!