I've just posted a new video about building aggregations in SSAS 2005 using the aggregation wizard. The video discusses:
- How to create aggregations in SSAS 2005
- The aggregation wizard
- The "one-third rule"
The video shows you how to run the wizard and the choices you have to make. This video runs 24 minutes.
This video, along with all others, can be found on the Videos page of the site.