As just announced on stage at TechCrunch Disrupt, Windows Live (formerly MSN) Spaces is shutting down and migrating their 30m+ users to WordPress.com. Four years ago I was fairly worried as every internet giant (Microsoft, AOL, Yahoo, Google) had a hosted blogging service. Now only Blogger remains, and is firmly in our sights. I’ve been impressed with Microsoft’s regard for their users in providing a solid upgrade and migration path with a really smooth experience, which I think is in strong contrast to Yahoo’s 360 or AOL’s Journals. Given that this effectively doubles WordPress’s user base, there is a lot of work to be done still, but I’m excited by the challenge. See also: official Windows Live post, official WP.com post, and 30+ other articles covering this on Techmeme.