Is there any official confirmation of mod support for the PC version of Dishonored? I think that mod support is vital to improve and increase the longevity of any game, and I think that Dishonored would be a great title to include it.

No word. Only that it may come out sometime after the game's release but no official confirmation.

Ok thanks, I'll have to keep my fingers crossed.

If the game has a small community they shouldn't really bother to be honest.

It's not as if I won't buy it if it isn't mod-able, but I'd be surprised if they didn't. The Unreal Engine is very customisable and easy to use (I use it myself), so I hope they release the editor for it.