Two weeks ago I attended meeting at Microsoft (in Redmond, WA) that was dedicated to Microsoft Office's binary file formats. As I'm working for a long time with corresponding Microsoft's departments, it was very interesting to meet all peoples who are involved in preparation of documentation on protocol and file formats, and also with developers of Microsoft Office.
Meeting was 2 days long, and MS Office's developers gave talks about internal details of MS Office, and how they are related to data that are stored in files. Besides this, it was a good chance to ask some questions directly.
Because this meeting was held for a first time, were not so much external developers (about 15 peoples from different companies), but were many peoples from Microsoft, and many questions were answered almost immediately, and we all had a chance to show broken/problematic files, show snippets of our code, etc.
Channel9 in near future should publish video taken from presentations, and I'll write about this additionally. Besides this, the separate blog was created, where notifications about future events will published. And I hope, that in future, such events will held in Europe...