I'm just excited to be getting back to the track since March! Just "getting away" from the daily grind for a few days will be nice.
As far as I know, you can still sign up for the track day through the convention website (link in the OP)... but if you don't want to commit to the full event, you can register for the touring lights groups via this MotorsportReg link (this includes Roadsters!!):
MotorsportReg.com : Asphalt Ventures, LLC announces Nat'l Z Convention - Track Day (Sun 1, Aug 2010) info at Nashville Superspeedway, Lebanon, TN 37090 (4644)
(weird how the site parses all that info from the url)
Also, anyone wishing to instruct at the event (ahhem... Sharif!
) needs to use the above link to go ahead and get registered.