I finally downloaded a copy of all TechEd presentations, demo files and hands-on labs. Because the filenames are very consistent (only the session number) I list the files in Explorer with the "Title", "Subject", "Author" and "Copyright" document properties. It's rather annoying that the authors (or perhaps the editors) didn't enter their document properties correctly. Many files just display "Speaker Name" and "Speaker Title" or "Slide 1", not very informative about the content. But sometimes you even see that speakers used a presentation from another conference (let's say Microsoft Mobility Conference) or that a presentation that was written by someone else (at least, it appears to be).

In brief: always make sure to double check the document properties before making a document public. Not only is this useful (indexing of documents for searching with Index Server or Google, exploring a folder, ...), it also show a slight touch of professionalism. Or am I being too picky?