BoonEx does supply documentation for some basic things when it comes to the "default" installation of the Product. But when it comes to more advanced or detailed customizations of what Dolphin is capable of doing, they (BoonEx) relies on the community members to discuss them in the Forums.
Not saying that the documentation could not use some "tweaking" for sure, such as "how to create a HTML block" or "How to create a Custom RSS feed", however the idea to improve this documentation is to get the community members to contribute to the Wiki. The Wiki is still brand new and requires the members to actually take the time to post something useful there, so for now, my best suggestion is if you want to know how to do something... search the forums.
You will find that when it comes to getting support for Dolphin, your best bet will always be to learn/ask from existing members.