Bob Bruninga has lost the signal as of 1753 EDT. Tom, WB2YDS, reported copying the signal at 1738 EDT on Long Island. Still analyzing the data from both - if you have any further data, please send it our way!
Below is a link to a short YouTube video of the balloon and payload shortly after launch. Sorry, no better pics or video of the actual launch are extant (my 12 year old son and I were a little busy with the launch itself - I pulled the camera out of my pocket as soon as I could!).