You notice all my posts have been removed from http://planet.ubuntu.com/, and that it isn’t updating anymore since around 5am UTC.
Why is that you ask?
None of us have been told for sure by Canonical, but for what I can guess, since the planet is hosted by them, they’ve frozen it due to a confusion on the press embargo being lift about the Dell story, and any of us who had mentioned it, got removed even though we haven’t broken any rules.
I might be wrong, but I believe “the planet” is an Ubuntu thing, not Canonical (they do host it), and as such commercial agreements should not affect it.
I understand it *might* have been a drastic measure, I’m just not happy about the way it’s being handled, and I’m not the only one.
Update: The situation has been cleared up, and efforts will be made to prevent this in the future. Thanks to all those who tolerated the frenzy.
Martin Albisetti's blog 
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