I don't know if anyone's pursued this line of inquiry, but I just fired off an email to one of the senior PR types at Creative.  Seems Creative has acquired what was left of Aureal.  I asked if Creative would consider releasing the tech specs and driver sources to the Vortex chipsets (assuming, of course, the Vortex stuff was part of the acquisition inthe first place :-) ).  Perhaps my inquiry would carry more weight if some of the rest of us were to chime in?  It's worth a try.

From:
http://www.americas.creative.com/corporate/pressroom/contact/

I contacted:
Phil O'Shaughnessy
Senior PR Manager
poshaughnessy@creative.com