I am a big fan of delicious for social bookmarking (you can see what I am saving at delicious.com/tgray) and it has become second nature for me to save things for reference later. One drawback is that when I am reading on my iPod Touch and want to save to my account, there is no app for that!! (Or at least not one that I have found and like!)
SpringPad looks like it might be an option! In addition to being able to easily save from the web, you can download an app to be able to access that information from your mobile device! And more than that - you can create to do lists and do other fun notetaking.
(Thanks to Free Technology for Teachers for the tip!)