I actually remember asking them how restrictive they would be when it comes to sharing when I joined and they said they weren't as secretive as Apple, but that they weren't completely open about everything either. If I had had the urge to post anything I would have run it past people before publishing details about what our team was working on, and it would have probably been fine. But in the end, like I said, I was always busy and blogging fell by the wayside. (I was never a naturally prolific blogger anyway)