Dean over in Greece stumbled on some cool Downpour Pre-Order bonuses today and sent them my way:

Seven Spots – Says Downpour is Releasing March 16 and offers a Downpour T-Shirt with Pre-order
http://www.sevenspot.gr/gr/GamesInner/9152cafbc91c8f89decd218085bba8fc/548-28443.html

Plaisio – Says Downpour is Releasing March 09 and offers a Downpour T-Shirt with Pre-order
http://www.plaisio.gr/Gaming/Games/XBOX-360/Konami-Silent-Hill-Downpour-XBOX360-1-19-07-08-003.htm

Public Says Downpour is Releasing March 30 and offers no sort of Pre-Order Bonus…

http://www.public.gr/prod/gaming/games/ps3-games/silent-hill:-downpour-ps3-games/prod1760019pp/

Source (Seven Spots|Plaisio|Public) Thanks so much Dean for the heads up and the translations!