I am trying to learn as much as I can about Product Management – its fascinating stuff 
- Absolutely love The Cranky PM (if you are a software engineer you sure will identify with the 5 stages of debugging)
- The Silicon Valley Product Management Association and their Resource list
- All about Product Management
- Why and how do engineers transition to product management? Some more advice for transitioning.
- Get real answers to your PM questions!
- Interviewing for a PM position? Some questions to help you prepare!
- If you need to brush up on some basics
- A PM reference manual recommended by a classmate (who actually works as a Product Manager).