I made some minor revisions to two articles that may be of interest. I'm never sure how to promote these things, since they're small changes and don't necessitate re-reading the entire article. This seems like a good way to do it.
Windows 7 Product Editions: A Comparison
I added some info about TV tuner support, which has curiously been an oft-repeated question via email. The basic deal is that in any version of Windows 7 that supports Media Center, you can have up to four TV tuners of each type.
I added information about the Office 2010 technical preview (July) and public beta (Q3 2009).