The full horror story of what has been going on over the past weeks or so is available on Blogger Buzz which is an official Blogger blog. Also, for those looking for info when they do have problem, check out the Blogger status pages. The long and short of the tale appears to be to migrate to Beta Blogger, although I fear if everyone were to do that at once it might have problems too.
Still... I have been testing Beta Blogger out for a while now and I think it's functionally better than Blogger and is operationally far more stable. The risk is mitigated by Blogger being awful anyway, there is no going back now.