Del.icio.us is a good platform to save and share links to internet resources. If you are interested in a certain link, but don't want to look at it immediately, you can safe it in del.icio.us and tag it with a specific tag, e.g. "toRead". Later, you can have a look at all those links.
Additionally, I use the del.icio.us plugin for firefox which makes life a lot easier (especially the tagging, because popular tags are proposed).
first i have to say, my solution works only for me, because it is only implemented in an prototyp editor i used for my praktikum. but maybe other people can use the idea on a bigger scale.
in my editor, i created the opportunity to make links, which are not anchored in the text. they are stored in an extra window, when you click on one of them, the positons in the text where the link is used are highlighted. you can also add a description for the link.
so now when i am writing, i see my stored links in the editor and if i need one, i can simpy track and drop them in my text feld.