I'm thinking of pre-ordering Dishonored on the PSN because i'll save ~$10 (that's enough to feed me for a day or two) but i'm really curious as to how big the file size will be. If it's too big i'll defiantly go for retail.

Anyone apart of the staff know at least a ballpark range? It's really annoying that the description lists things like "1MB minimum save size", 720p res, 1 player... but not the file size!

That's a good question I was wondering that too and for the retail version if there is a mandatory install or not for PS3 version.