Roman Villareal and Chris Martinez, who run the Flash Platform UG and Flash Meetup Group, have organized a CS5.5 Camp event at St. Edwards University on August 9, 6:00 – 9:00 pm.
The event is free, and so is the food. I think it will probably be very useful in getting a feel for how Adobe is dealing with the shifting landscape, in regards to Flash. Since Flex is directly dependent on Flash, this is likely to be a worthwhile event for Flex developers.
You can get more information and sign up for the event at the Austin Adobe CS5.5 Camp event page.