Thanks for your serie, I've improved my crash analysis skill a lot a since I've started watching it!
Our software (win32/C++) does not have a huge installed base, but we still try to improve it by using error reports from sysdev.microsoft.com. Even if we don't have a huge number of entries reported, navigating the website is very slow and also managing reports (like determining new reported from older one, or if new CAB has been added to an existing report) is a very painfull process.
I don't know how you are able to handle 100'000 of reports, but I'd guess : not through the web interface
Any plan to improve on this area?
Also, I'd like to hear about managing error report from a third-party point-of-view. Maybe next time you invite Graham McIntyre, you may ask him what he think about it!
[EDIT: I've found more information on the following Q&A page from the WER team: http://blogs.msdn.com/b/wer/archive/2012/03/28/windows-hardware-dashboard-reports-faq.aspx ]