Pegby is a site I just found out about from the great, iLearn Technology. This is a site that is similar to Pindax that it lets users "peg" note cards into their board. Boards are the walls that users can add content to. Once the note cards are added they can be shared w/ others or move from board to board in a drag-n-drop interface.
I highly recommend checking out Pegby for an innovative way to take and share notes by clicking here!!
Click here for my top 10 sites for note taking.
Below is a demo video....