Thanks for the warm welcome. I'm finding the users here are on another level as the Pod HD as well. I'm just getting into the forums, and I haven't seen much of the "How do I do <basic function>?" "RTFM, noob" dialogue here, which makes me smile. I see lots of advanced posts on the unit, and many of the users seem quite informed as to all the deep parameters and how to manage rigs.
I have actually looked through the basic manual and some of the advanced manual - I just avoided the UI stuff to see how intuitive the unit was and was VERY impressed on how easy it is to use despite it being something completely new and having so much capability.
Viabcroce, I saw the wiKPA page - excellent stuff. I'm already a contributer actually - I posted the 2.2.0 beta release notes. I hope to be quite active in fleshing out the wiki.
I have not gotten into mixing cab and amp profiles yet. That's kind of phase II for me. Right now my goal is to identify as many free rigs as I can that sound real nice, then tweak them to sound exactly how I want them. Obviously, part of that will be mixing amp and cab profiles - finding my favorites and finding new methods to get different sounds out of them.
I did try to mess with the cab profile parameters. These have some rather bizarre effects on the tone and not sure how I would really use them right now. Subtle tweaks to character seemed to be ok, but any adjustment to low or high shift seemed to hurt the tone.