The complete version of the Management Pack Authoring Guide is now available for download in Word as part of the System Center Operations Manager 2007 R2 Documentation. This one is an update from the pervious version that was missing a couple of the completed sections that are now available. I personally prefer to get my content online, but we get a lot of requests for the guides in Word. I know there are people who need offline access and who may just prefer to print some of the topics.
Great stuff! One comment I have with this and some of the PowerShell related videos: Instead of a PowerShell script with one required parameter, it would be helpful to have a PowerShell script with one required and one optional parameter. That way we can see how the "flow" works through the Probe Actions, Data Sources and Monitor Types.