Daniel Frankel, paidContent.org:

That speed to get into the market was second-guessed at CES this week, with accounts of early adopters frustrated by UlraViolet’s extensive digital rights management, which requires users to register at two different websites.Singer boiled down these troubles as “unfinished carpentry” on a “great house,” but others were vexed by their inability to get their UltraViolet movies to play on mobile devices made by Apple, which notably hasn’t yet signed on to DECE.

For the uninitiated, UltraViolet is a new “cloud”-based system that lets you watch movies you’ve bought on DVD or Blu-Ray. Warner Bros., Universal and Paramount have all signed on to the new technology, which saw a push around the holidays with promotions of home video releases including Green Lantern, The Smurfs and a few others.

The problem for Apple users is that it doesn’t work on iPhones, iPads or iPod touches, effectively locking UltraViolet out of use of some of the most popular portable electronics available today. And with Apple’s iTunes as a direct rival to UltraViolet, I think it’s safe to assume that Apple’s in no hurry to do a deal.