I have been a loyal user of Delicious for over 10 years… before it was owned by Yahoo, while it was owned by Yahoo and after it was sold by Yahoo.
It provided the core functionality of bookmarks and it did it well. But after the most recent ownership transfer, its core functionality is getting worse and worse.
For starters, they stopped supporting firefox plugins. Sure you, could “post” to Delicious (that’s a simple bookmarklet), but if you wanted to search or view, you needed to go to the site. I found a work around with Delibar which allows you to sync and search without going to the site.
And today, that stopped working. So I’m done with it, I’m going to Evernote and be happy.
If you are interested, check out this great tutorial on how to import into Evernote: http://dr-palaniraja.blogspot.com/2010/12/import-delicious-bookmarks-to-evernote.html