I too just got the K10D after owning a DL for a year and a half. The Pentax manuals to say the least are not very informative and you have to have a good understanding of basic camera functions to be able to understand the manuals. This includes the flash manuals.
I am working my way through the manual and writing in my blog. If you are interested please follow along and leave comments on how I can make the blog better.
Right now I've started with the basic stuff and will delve in deeper to each setting as time goes on.
It's a learning experience for me and I might was well pass the info on to others.