I talked to Brock at Tireballs on Monday and he said that they were mailing out letters to riders who had signed up for the year. You should be getting this letter this week. The date for redeeming them has been extended to Jan 31st. Tireballs will also be a sponsor for 2007 again.
Just remembet that tireballs are not legal in the stock class.
If anyone has any ideas for sponsors for 2007, send that info to me and I will contact them.