I'm working on an application that uses the Render() and RenderStream() methods of the SRS ReportingService interface. This app is an ASP.NET WebForm that calls Render() for a given report (and RenderStream if the report contains stream resources – images, charts, etc), gets the results back as HTML, and outputs the HTML inline in the WebForm.
As I got started on it, I had some problems getting the rendered images to appear in the report. It turns out that these resources are output without any file extension, so IE wasn't sure how to handle them.
Note, the above will only work for charts within the report. I haven't yet figured out how to do this for multiple file types (say, PNG, CSS, etc). If anyone knows how, I'd love to hear!