I love Scoop.it! It is an incredible way to share great sites and tools. In addition, I quickly post to my WordPress from it and then WordPress publishes to Twitter, Facebook, LinkedIn, etc. The interface is amazing. A simple shortcut on your toolbar that says "Scoop it" is all it takes to instantly add an article to your Scoop It page. In addition, you can manually add if you need to. Another favorite of mine is how well it picks up the content on the page so you don't have to. Occassionally I have to add details and that's ok. Now, I can add tags, too! I think you'll love it!
As a note, I was just given 10 invites to it (it's a by invite only program) so if you think you'd use it, please let me know and I'll be glad to share my invites till they are gone!