Blogger's post editor it now automatically saves a draft in the background as you go along, once a minute, without your having to do anything - just like with draft emails in Gmail.
But it doesn't do that when you're editing an already-published post, which is fair enough and very sensible.
I've been wanting something like this like, forever, because I've lost too many long posts to browser or PC crashes. I'd taken to drafting long posts offline using e.g. the open source Web editor NVU, or if I was using the post editor I'd regularly hit Save as Draft, then go back into the post from the Edit Posts page, which slowed me down some but was better than tearing my hair out or weeping because a difficult post had vanished with a crash.
As a keyboard shortcut fan, I'd had in mind ctrl-s as a hotkey for saving and continuing, but automatic is excellent, thank you thank you thank you Team Blogger, bless all your little cotton socks!
And, you know what else? I just checked and they have added ctrl-s as the hotkey for "Autosave and keep editing", too. And ctrl-shift-p to toggle between Preview and Compose view (that's not so new, but still).
And changed "publish" to ctrl-p - yes yes yes, far too often I've accidentally published a post when I didn't mean to, because I tried to use ctrl-x and slipped and hit s instead. My cup positively runneth over!
Now, if only they'd introduce (1) a keyboard shortcut to toggle between Edit and Compose tabs, and (2) ctrl-shift-l for a bulleted list, my happiness would be complete. (Yep, give me an inch and... )
Thanks again, this is absolutely marvellous.