Looked for a reliable document oriented database, and after some tests and code, decided to give a try on MongoDB for a small proof of concept that i am working on. On the rest of this post i will try to guide you through the main principles of MongoDB integration with PHP.
Jens Østergaard gives a great talk about "Why is scrum so hard". A great talk about the challenges of scrum using some real examples. Slides for the talk can be found following this link (http://files.meetup.com/936565/20090819-SFAgile-Jens.pdf).
Just found this video of a talk about Scrum by Marko Gargenta, that i found usefull to share. Are you using SCRUM on your projects ?