We're considering the use of DNN as the basis of our customer-facing applications, which are currently developed in a conventional corporate environment - i.e. we have development, test and live servers, and each change is progressed from the development platform to the test platform before being deployed on the live server. Does anyone have any experience of implementing and maintaining a DNN environment in this way? If so, how easy is it to maintain separate development, test and live platforms, and to migrate new application releases from one platform to the other?

Are there any other considerations when thinking about DNN as an enterprise development platform?

There are a lot of things to consider when running DNN as an enterprise solution, but as with any application the limitation will be developing and managing those strategies properly.

Development/Testing/Deployment of modules for your application will be key, if you have a good process defined though that management/deployment can be made very easy through the use of packaging scripts and even deployment of these new modules/packages can be automated

"Easy" depends on your command of SQL Server...  :)

In most cases a development environment would be built to match the deployed system, code developed and tested there, modules created and packaged and then the module uploaded on the production server.

Jeff