The navigation bar
The "tag this!" box in the left-hand side navigation bar includes links to several bookmarking services. These links make it quite easy to tag whichever QED page is being viewed.
It uses the <sharethis> tag.
Limitations and enhancements
Currently, the list of bookmarks cannot be customized, but enhancements are being planned.
If you have any suggestions, please send mail to email@example.com.