Wow, can't believe it's been over a month since my last post. I've been pretty busy getting back into the Office 14 project, the recently released Open XML APIs, as well as the Office 2007 SP work (where we'll be introducing the ODF support). I haven't had as much time to stay on top of the blogosphere, and also haven't been able to write much myself. For folks interested in following along with interoperability and file formats in Office, I would suggest subscribing to Doug Mahugh's blog. He's a member of Ecma TC45, and has also recently joined the OASIS ODF committee.
Today Doug has a post discussing the updated binary format documentation that was recently released.
I'll definitely aim to continue this blog, but most likely the frequency of posts will be fairly low (maybe once a month?). In the mean time though, here are a few great blogs: