I use it and love it.
I've built several DNN site for myself and others and I love it. It seems to me to be much more of a framework for .Net developers to build on than a full CMS for amatuers (this IS a developers thread, right?). It is very flexible & the design of it helps you keep things modularized, which really helps in the long run with any project. The skins that you buy or build can be completely html or css or a mix of both. Whether or not a site is compliant is in the skins, not DNN itself.
One thing to keep in mind is that all modules for it, 3rd party or DNN packaged, are rarely exactly what you want. Always plan to buy the source code and customize as needed. $100 for code to save yourself 10-20 hours of work is always a bargain, wouldn't you say?
