This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Some years back I remember reading about a browser plugin which would let the user
1) Open a page
2) Select some text/section/element
3) Add a "post it" kind of not the the selection.
You visit the same page later on and the note is displayed.