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.
To compare six different APIs in five categories is a far-reaching question about which whole whitepapers could be written. I doubt that you'll get an answer that's anywhere close to being as complete as you would like it to be. Can you narrow down the scope of the question? What have you found in your research so far? [ March 25, 2008: Message edited by: Ulf Dittmer ]