If you've ever been interested in writing your own Daggerfall tools, but haven't been able to get into the file formats, I've started a new project called the http://www.dfworkshop.net/?page_id=396. This is a C# rewrite of the code I've developed over the years for getting data out of Daggerfall's files, bundled up in an easy-to-use class library. While still in the early stages, I have decided to share this right from the start so I can determine interest in the library, and garner feedback from anyone who might get use out of it.
There are a handful of http://www.dfworkshop.net/?page_id=401 to help you get started (source for these is included with the download), and of course the http://www.dfworkshop.net/?page_id=398 itself. I am still working on proper namespace documentation, but XML documentation is included with the library, which should show up in Intellisense when accessing the namespaces.
The intermediate tutorials cover writing small applications such as a http://www.dfworkshop.net/?page_id=494, and a http://www.dfworkshop.net/?page_id=511 using minimal code, and no knowledge of the file formats needed.
I will be adding to the tutorials over the next couple of weeks for proper 3D visualisation (using XNA or Ogre, I haven't decided yet), and working with dungeon and city blocks.
If DFConnect is something you are interested in using, please download and let me know your feedback. I will be open-sourcing DFConnect once it is a little more complete and polished than the test build up at the moment.