I was trying to get some unit tests to work when I got an error similar to:
Retrieving the COM class factory for component with CLSID {BA3D0120-E617-4F66-ADCA-585CC2FB86DB} failed due to the following error: 80040154
The resolution was to install Blackberry Desktop manager, and it was simple to intuitively figure it out because the program I was debugging had to do with blackberries.
Obviously Googling for the GUID gives enough information to lead you in the right direction. However, I was wondering if there was any sort of website that acts as an unoficcial registry for COM object GUIDs?