Maybe Aero's IR can elaborate further with info specific to Aero. I'm glad you asked, since knowledge about unregistered stock is important... <a href="http://findarticles.com/p/articles/mi_m0EIN/is_2008_Jan_31/ai_n24241716" target="_blank">http://findarticles.com/p/articles/mi_m0EIN/is_2008_Jan_31/ai_n24241716</a>