I didn't feel strongly one way or the other about the Windows 7 product name (i.e. "Windows 7") ... until recently when I wanted to troubleshoot the Azure SDK on Windows 7. (Apparently Azure on 7 has worked with the M3 build for at least one intrepid forum poster, but it's not behaving with the beta build for me at the moment.)
I started searching newsgroups, forums, blogs, etc., and realized that "Windows 7" is not a great search term.
On an engine like Google you can put quotes around it, specifying exact phrase, but some other full-text search systems don't seem to want to keep the Windows and the 7 together. Or perhaps they have an index by single words, and they link the results together to match your phrase later, but once you throw in other terms like SDK and Azure, the matching engine becomes a little more promiscuous, offering you a "promising" combo of Azure, SDK, and Windows ... or SDK and 7 ... as a higher-ranked match. Making it, in any case, rather harder to find what you want.
One-word product names, like "Silverlight," "Vista," and "XP" work a lot better for this kind of search.
Which is perhaps a reason that folks include the release name with the version number on products such as Ubuntu (Hardy Heron, Intrepid Ibex, etc.)
So ... what would be a good nickname to put next to Window 7?