I actually get Object reference not set to an instance of object error as well, eg. in Web Server\Site Traffic by Day Of Week.
rlucero, the article you referenced actually misses the TestReportingFeature class. And also, is there any documentation to this SQL syntax or what it is?
To provide some feedback on the extensibility: Well I have not fallen in love with the model, it just seems too complicated (and maby old, too) to me. The other story is the COM log parser, which really is a pain for .NET developers to work with. I hope it will get better.
Anyway, I will have to create completely separate module for my statistics, because the current definitions are not flexible enough (I mean the table and chart) for me.
Still I consider the reports extensibility to be a big step forward, keep going! ;-)
Jan