Here is a blog post with details of last Saturday’s flight, copied from Space Quest.
BTS-1X, a high altitude balloon test flight, lifted off from Carrollton Georgia on July 23, 2011 at 12:24 PM EDT.
It crossed the state line into Alabama, climbing steadily until it reached 78,819 feet, and then radio transmissions fell silent for about 45 minutes, except for two very inaccurate data packets.
Based on the angle of the cameras, which were taking photos every 30 seconds, we think we can tell when the balloon burst. With this information, and the ascent rates from APRS data, we should be able to get an accurate idea of our highest altitude. Early estimates say that we were just over 110,000 feet!
After about 3 hours and 15 minutes of flight time, BTS-1X landed in Lake Logan Martin. We quickly arrived on the scene and were able to verify by tuning our radios to the APRS frequency that the capsule was safely floating and still operational. Within minutes, we found a group of people with a jet ski who were willing to go out and recover the capsule for us.
You can see all of the BTS-1X flight photos here.
This is the latest balloon trajectory prediction. When I zoomed in, I noticed that we fly very close to O2 Plus, the place where we get the helium, at both 10,000 and 90,000 feet. If we burst there, does that technically mean we’ve returned the helium and can get a refund? 
