Internet Explorer Mobile 6 on Web compatibility test for mobiles (IEMobile 8.12)
Passes 3 & 4 like www.flickr.com/photos/hendry/3041254926/.
10. inputmode attribute and 15. contenteditable seem to pass. Though I suspect that could be a false positive.
So I tentatively conclude that MSIEMobile 6.0 does not really bring any new features to the table. Golly. :/