This time it seems to be working much better. Local Markdown works, and I could define my usual shortcuts easily with the markup editor.
I've still haven't found a way to import all my posts (I want to have the full history locally), so I'll have the check the manual for that one.
In the features-I-would-love-to-see-departement, I haven't found a decent pre-post analysis tool. If I repeatedly link
http://daringfireball.net/projects/markdown/, my blog tool should suggest the same link in future posts.
A nice tweak to the editor would be smart quoting: if I have a selection active and I type
, or_`, it should wrap the selection with that characters.
So for now, I've switched. Let's see how it goes.