How about Dominic West ? If Craig does leave in 2012, he'll be 42 or 43. Though I usually like an actor between 35-40, that isn't too old.
I love him in The Wire - and I was suprised to find he was not only English but an old Etonian. Not sure if he's got the intensity Bond needs. He seems to have a semi-permanent smirk on his face which is more cheeky sailor than debonair killer.
Definetly looks Bondian though - well,apart from the smirk.
Recently read an interview with him where he jokes about having been 32nd on the list for CR. He also admits that - whilst he'd have liked to've taken Bond in a grittier direction - Craig did it a lot better than he could've.
I seem to recall that West auditioned for Bond in CASINO ROYALE, and did so in T-shirt and jeans in a bid to make himself stand out from the other actors.
Of the people who were up for Bond last time, the only ones I'd like to see considered again are Alex O'Lachlan, Goran Visnjic and Sam Worthington, and maybe Henry Cavill if things are looking desperate. Otherwise, David Oyelowo would be my pick for 007.