Not quite related to the redesign, but can the comment "Sort By" dropdown's values have a #comments anchor appended to them? When I change the way comments are sorted, I want to be start reading through them straight away, without having to scroll down.
Design sketches
1. Notes on differences between these images and what we're planning on implementing:
2. Meetup widget in sidebar, listing the 5 nearest meetups occurring in the next 2 weeks, linking to:
(something like right-click & "Open Image in new tab" will help here)
3. New headers: