Don't see this one posted.
http://www.amazon.com/Blur-Pc/dp/B002AQNT96/ref=sr_1_4?ie=UTF8&qid=1296534777&sr=8-4
I don't think the retail version activates on Steam, and I'm not sure this got all the fixes that were expected, and now Bizarre Creations is shutting down.
http://www.gamasutra.com/view/news/32519/Activision_Moves_To_Close_Bizarre_Creations.php
http://www.amazon.com/Blur-Pc/dp/B002AQNT96/ref=sr_1_4?ie=UTF8&qid=1296534777&sr=8-4
I don't think the retail version activates on Steam, and I'm not sure this got all the fixes that were expected, and now Bizarre Creations is shutting down.
http://www.gamasutra.com/view/news/32519/Activision_Moves_To_Close_Bizarre_Creations.php