I logged into the sampler site and toyed around with it in the different browsers (IE 9, Firefox 15, Chrome ??) on Windows 7 with only input boxes behaving in different ways. Escape key could be used in IE to cancel input but not in others. On my iPod Touch, Safari could not render anything and Opera Mini could only show the front page but did not allow interaction. On my Nook Color, the Browser app also could not render the site either.

Overall a nice little library with most of the expected widgets. Too many issues with the older mobile browsers that I'm not sure I would use it just yet but I would give it serious consideration as it does look like it might improve the experience for business apps we currently deploy in-house. I would probably need to actually download and toy with it for a more complete experience.