Worthplaying.com has a few nice new screens, info, and then states it's PC/360. No other formats are mentioned.
Introducing a new hero, a Dark Elf named Isabella. As other shots have shown, it looks insane. a 2009/2010 release date is planned.
Edit: The pics aren't showing up. WP may have blocked the linking of them from their site 
As for info:
- Multiplayer Online Game where thousands of gamers can join in Massively Multiplayer Online World and engage in the epic scale war as you declare war against other online players and unite under the banner of your guild. Conquer your foes and emerge victorious as the ultimate conqueror of the continent.
- The Perfection of Action and Real-Time Strategy game system with highly intense and stylish action at intuitive control while succeeding all the great merits of previous franchise.
- A True Action RTS inheritor of the world acclaimed Kingdom Under Fire series, which continues a saga of Bersian heroes on Kingdom Under Fire universe and write your own epic poetry of war thru several types of game modes.
- Unprecedentedly Blockbuster Scale with thousands of units being overwhelmingly co-displayed at any one screen to deliver the most intense and realistic mediaeval battle onto your nose.
- Startlingly Detailed Graphic on every elements of game that truly sets a new benchmark in today’s gaming with massiveness and realism. Taking leverage on the FameTech 2 technology, an advanced engine developed in-house, thousands of realistic and detailed units will engage in ferocious battle.
- Story Campaign mode for your download to enjoy deep and rich storyline that opens new chapters of eternal conflict between races after 150 years passed since the 2nd War of Heroes.
- Newly Introduced Electronic Game Cards for your download to recruit new units, equip new weapons & armors, obtain mother-ships, and instantly boost up the power of your characters with special ability.
- Competition and War among 3 factions over the domination of Bersia continent each consisting of unique units up to more than one hundred types for your direct control aside from the first-hand hero action.
Kingdom Under Fire II is aiming for 2009/2010 release and will be available worldwide on both PC Online and X360.
Oh, and a few older pics in case you missed 'em:


KUF2 may be a ways away, but Heroes and Crusaders were 2 of the best RTSes ever to grace a console. I beat all the campaigns in Heroes, and it was a blast. Solid 80-85% game, so if they do a decent job on this, it may be the best RTS ever created.