I have set up a delicious account and played around with it a bit. I can see its advantages in organising your bookmarks and making them more transportable. Locating and organising sites is not a problem for me at the moment - it might be if I was more mobile in my work or personal use of the internet. Delicious seems a bit complicated and i think you would have to really spend some time to fully utilise the program. I can see it could be useful in identifying information about a new subject, perhaps for reference work.