I really do think Delicious has potential. I can dump anything here, and tag it in a way that will make it easy for me to find later. I can see using Delicious to gather together cataloging information, tagged appropriately by subject for later reference. I can also see using this personally on whatever topic I like - scuba diving certification, good places for hiking, just about anything - even a place for random sites that I really like and might want to look at again.
I do think this could be very useful as part of a project, to gather related information in a place that is easy to get to AND searchable. It also really is useful that it's web-based, so I can access it no matter which computer (or phone) I have. As long as they stick around, that is.