I interact on both LJ and DW. I find interest in DW from LJ folks, but their interest often ends with the price tag for a paid account features. I point out the ability to interact with Open ID, but many just do not seem to think it's intuitive enough to try and learn it despite the simplicity of the concept.

While there is a lot to consider with multiple levels of account service, in the end I think it would bring more users and activities to the site. Ultimately, some of them will be willing to invest in the higher cost of a full account.