Lynx also shows these links. They are displayed at the top of the page, before the main contents, and the hotkey # is used to jump to them directly. A # is displayed on the screen if there is a link bar but it is not currently in the display area.
<link> tags are nice, very nice. Especially since it makes site navigation consistent between sites, and since I'm using a translated version of my browser, the links are translated for me, so I can find the "next" link even if the page would be in a language I would not understand otherwise.
something else i was thinking about this weekend. given that the code can get quite lengthy if you intend to support LINK based navigation systems on your site, how much impact would all those LINK tags in your document HEADs have on the search engines?
i guess having them at the top of the document is quite useful from a SEO perspective IF they are spiderable.
otherwise I can't help thinking it just adds more code before content.
course, usability is increased by them but since the great majority of net users have no idea about them and use browsers that do not support the concept (least I never saw anything on IE that uses them) is it really much of an advantage catering to a few power users with Opera/Mozilla?