Thanks for the above. I RTFM'd again and found where I did miss a step. Now, I've carefully followed the instructions thus:
1. Installed component, modules, etc... (as mentioned, login works in Kunena)
2. Created a Public menu link in a menu that's inaccessible initially. (and, when that didn't work, i created a link to the CB profile doodad right on the front street top menu just for funsies and it successfully broke my layout, but didn't seem to change my situation)
3. Disabled the Joomla Login module in the module manager and enabled the CB Login module, publicly accessible and published to the same location.
4. I'm using the HOT Login plugin (i know, i know, stick with me here) so I went to the configuration for that and set the module override to mod_cblogin.
5. Still not working!? I check the markup and see that HOT Login is displaying the <blah>/comprofiler/login.html-related form. I go ahead and disable HOT Login, breaking my layout again, and it still doesn't work.
The only module I could find to circumvent the traditional login stuff is for J1.5 only and did terrifying things to my entire site when I tried to shoehorn it into place (dear reader, don't get desperate and think you'll hack the Disable Core plugins onto your J1.6 install. i had to issue an SQL statement by hand to disable the little bugger as my admin interface was burnt, too). Here I sit, dead in the water.
I searched the forum here and found no solution. Perhaps this has been addressed in previous posts, but I'm at a loss. I've cleared my schedule for the morning and I'm going to start really digging into this today. I'll post what I find.