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.
HTML works for formatting mails (although many people severely dislike HTML mails), but I'm not sure you can (or should) take it as far using it for forms. You're better off putting a link into the mail that takes the user to a server where the form page is hosted.