Thanks for the article - a great summary.
I have been working with a number of these options recently. A particularly useful feature is being able to set the background image based on some criteria in the data using an expression. Something like a big red "DRAFT" watermark can be quite nice in certain circumstances.
One question: in SSRS 2000 SP2 we keep on getting situations where images are not displayed in the report (whether populated from the database, or an embedded image) - we simply get that irritating little red X in place of the image. This appears to happen when deployed to certain servers, but not on others. Any security issues or other pointers to solving this issue?