Wanted to mention I'm in both the multiplayer and Single player Beta and using a Triplehead2go, been reporting back to the devs anything that looks out of place and so far gotten assurances from Serdar that there will be further improvements for our resolutions coming in the next version (currently using 0.720). The battle 3d engine is pretty perfect but the map mode and all the menus & HUD etc are still using old school stretchy methods that's all(but again these are reported as fixed for next revision). Serdar basically said he'd wrote a check that if the aspect ratio goes beyond regular wide it'll display things in anticipation that its a triple screen setup, hopefully this means all the overlays just on the center screen.
Wow not bad, do M&B owners automatically get Warband for free? Might play some of it again if they fix the text stretching issue, that seems really annoying.
I doubt we'll get totally free copies come full release at the end of March but meh you get to try it out and ho boy its pretty entertaining. If you own the original you can go grab the MP beta through this link here:
http://beta.taleworlds.com/download.aspx
I'll keep you all updated with the progress as I want to see this game fully support these glorious resolutions and get an A+ from WSGF upon release :)
ED: Right if this thread could be moved to the general multi-monitor gaming forum that's probably a better spot :)