"I wrote Mark Cuban this morning @ HDNet and he actually replied almost immediately.
Here's his response regarding my question of "when will it air".
Mark: "No date set yet. Go to www.hd.net and subscribe to the concert newsletter to find out when" (Thanks Jeff)
Update: Just got a response from HDNet: "We did shoot the concert but don't know as of yet when it may air on our network. Keep an eye on our website for details as we will post the concert dates once it is scheduled - probably at least a few months from now."