Here is another great resource I came across today featuring a list of prominent authors and illustrators on Twitter. If you are planning to make Twitter part of your professional development plans ( which I strongly recommend for you ) then you have all kinds of resources to start with.
Create notes in your own workspace wall. You can save your workspace at any time and return to them from the same computer or any other computer. You can also share your notes with others by providing the workspace name (or url) to a friend.