dotNotes

dotNotes... Synchronize your Sticky Notes via iDisk Storage.
dotNotes is very much like Apple's Stickies application, but it has a strong feature which enables you to synchronize your notes over several machines using your iDisk storage (in order to use iDisk, you must be a .Mac member).

With this new version, you can create a Public notes to share with your family/friends.
And, of course, you can use dotNotes locally on a single machine just like Stickies, too.