Mhm... I chose Maemo because I wanted freedom. Free software, yes, but also the freedom *not* to give away my personal data. The more I think of it, the more I believe that the freedom to keep data to myself, not having to sign up to some cloud service or having to use a certain account, is even more important than the fact that some version of the OS on my phone is open source at some stage in development. Given a choice between Windows Phone and Android, I'd stay away from phones altogether. If I had to use one, I'd use Microsoft. Never trust Google. Never ever.
With Linux and OS X, it is beginning to make serious inroads into the personal computer market as well.