http://dietandbody.com/morning_exercises.html
This article does a good job at presenting both sides to the story of when to do cardio. i'd be willing to bet that it was posted before, but still should be read by all that dont know when to do their cardio and at what intensity. Also, it's written by a bodybuilder with no real reason to prove his point so i dont think any info. is skewed. take a look and feel free to speak up about it.