Superman pointed me to the PL Documentation on the Content Sidebar, and it appears that it can only be added to the Default Template and to a Blog Page. I've been trying to add it to Template 3, but if that's the case, no wonder I couldn't find it.
What I'm trying to do is make a page where the main content consists of a number of block-like div or widget sections, for logged in users to come access all their personal options. So in one block floating left, they'll have a link to their message center. Floating right, they'll have a link to their user files. Below that, floating left, a link to their booked events. Floating right, next to that, a link to their database history, or whatever. And so on, three or four rows deep, two (or possibly three) columns wide. I want the interface to be primarily graphical. Perhaps I can do this with a columns shortcode or something, but that would exclude my using any widgets. Anybody know the easiest way to achieve this?