Del.icio.us is certainly a nifty tool. Yet I have been using something similar for a while–Furl, which is also recommended by other librarians. How is Del.icio.us better than Furl? I guess I need to find out about ways to export my stuff from Furl to Del.icio.us?
Both are certainly wonderful tools for research at least.
I set up an account with Del.icio.us, yet can’t add the button/bookmarklet to the browser, since I would need the administrator status to install the software.

