Launching Next has discovered 2 sticky note startups.
Diigo - Web Highlighter and Sticky Notes, Online Bookmarking and Annotation, Personal Learning Network.
Diigo is a powerful research tool and a knowledge-sharing community
Groups in Diigo
Diigo Groups provides a ground-breaking collaborative research and learning tool that allows any group of people to pool their findings through group bookmarks, highlights, sticky notes, and forum.