So the new Bing is rolling out and since I saw the invite on my phone I figured I’d give it a shot. Just like on your PC you need to add your Live and Facebook accounts (just email and password) and otherwise it works as expected. I guess the compatibility of IE is at work but you’re not kicked into a mobile site or anything. The sidebar is there. This requires you to go to Bing.com and not use the search button though.