Diigo- first impressions...I love that it only took 2 sec. to transfer my bookmarks from Delicious to Diigo. I also really like that Diigo allows educators an upgrade ; I'm awaiting the email confirmation to test that out. It will be nice to be able to add sticky notes and pictures onto sites to remember more information. Tags are a great way to keep organized, but just using generic tags such as "education" or "technology" makes for a broad range of potential sites. Often times, a website can fall into a few different tag categories making it difficult to remember which category I put it into. Hopefully, by adding notes, I'll be able to better remember the sites. Furthermore, I'm interested to learn more about books online and Diigo.
It's clear that Diigo has more functions than Delicious, so I'll be using Diigo more to try them all out. I like that Diigo does not require student emails for students to access the site. The creators of Diigo have given thought to protecting students, which is respectable and helpful. I'm interested to find out how exactly that works (giving multiple students access to Diigo in a safe setting), but for now I have the main gist of it.