So what is the story with transponders for the 2009 season? Are they required? Some of the threads here indicate they are not mandatory for race weekends.

Is MRA selling them still? There were a couple threads that indicated you could buy them from MRA at discounted rates if they rented for the season prior (2008 purchase). What are the restrictions/policies for the 09 season?

Is there one brand that works best with MRA's setup if purchasing from external companies or people selling their old gear?

Do any of the track day groups have a transponder system they use during a track day/weekend? Same system as the MRAs?

Thanks