After using DMS for a week, I must say I am impressed with it. Overall, it is better than anything I have used so far. I believe the concept is sound and it has the potential to be "insanely great."
The reason I say "potential" is that PageLines still needs to deliver on DMS's basic concept of having well polished Sections. I know you have opened the "Store," but you desperately need some vital and "insanely great" sections "in the box." Right now, the included Sections don't rate very well and the Store is not well stocked - yet.
Let me give you a couple of Section examples as illustrations. The first is the Content area. Out of the box, it has a large white space underneath the Author picture that runs all the way down the side of the Content. This wasted space is not something that would be in an "insanely great" Content area.
Another example would be the "Rapid Tabs" section. You can't even filter the posts for Category. This shortcoming definitely fails the "insanely great" test.
If I were to rate the Sections on a scale of 1 to 10 in the "insanely great" category, I would give the best ones a 5 and the worst a 1. They all need help. Some need data help like Category filters (e.g. no filter in Rapid Tabs). Others need design help so they coordinate better with the overall layout (e.g. the wasted white space in Content).
I might suggest accomplishing this with two coordinated efforts. First, for each Section, I would suggest "playing with" the best competitor widgets on the market, and then making your Sections "insanely great" in comparison. I would also suggest having a graphic designer load all the Sections and redesign each so that they fit together and rise to the "insanely great" level. Once the sections are "insanely great," any page that uses them will be "insanely great."
You might also lay out some suggested design criteria for the Store plugins so that they integrate beautifully in the design. With a "design certification" program for plugins, you could tell users which plugins meet those criteria.
Over the last week, trying to fix and compensate for the "less than insanely great" Sections has chewed up 80% of my time. I've searched for a lot of Widgets and written a lot of CSS that would not have been needed if DMS were "insanely great." I believe you will have an easier time charging premiums to developers if you can eliminate this kind of time wasting frustration.
Don't misunderstand my criticism. I am no dissing PageLines or the DMS. I am giving honest feedback that I hope will help you create something that people need and want. I think DMS has the potential to be the "iPad" of web design - beautiful, easy to use, and well designed. But DMS is still just potentially "insanely great" right now.