http://bzed.de/posts/2010/05/new_css_for_bzed.de/
smcv: [10:59:01] is the logical thing you want a <div> whose meaning is "the bits the sidebar is allowed to accompany"?
bzed: [10:59:14] yeah
bzed: [10:59:58] then you could just ensure that this part is as high as the sidebar
smcv: [11:02:44] wrapping a <div> around the sidebar, content and comments seems like the way forward, then