You're right, we don't go too in-depth on self-deprecation anywhere on the site.
The other authors and I have talked about it a bit in some other pieces:
How to be the Funny Guy that Gets Laid
How to Be Funny and Make Her Laugh
Dialing Down the Value Volume
... however, it's only brief mentions here and a few tips on when to use it. Nothing too detailed.
Looks like I've had "do an article on self-deprecation" on my topics to-do list since mid-2013. Maybe I'll see if I can bump that up a bit :)