I'm trying to get a working knowledge of character animation in Houdini for an upcoming project. At least for me, video tutorials are the most effective way of getting up to speed quickly. I've watched

3D Buzz, Houdini Issue 2
http://www.3dbuzz.com/vbforum/sv_dl_list.php?c=11 [3dbuzz.com]

SESI's Autorig and New Muscle Tutorial
http://www.sidefx.com/index.php?option=com_content&task=blogsection&id=14&Itemid=132 [sidefx.com]

Are there any other video resources (free or paid) relating to character animation and rigging? I'm specifically interested in learning about capture geometry, posing, setting up and integrating animation cycles, blending, etc.

there really isn't anything more than you've found…
however there are studios and individuals doing character work in Houdini…
so at the moment it might be best to just search the forum here and at www.odforce.net then ask some specific questions about what you want to do…there are lots of people who will be willing to help…