Posting this with the Atomic plugin for Firefox, an APP client. Maybe i should try Windows Live Writer too...

Update: after managing to adding a "Service" (required a second Firefox restart after creating the new file to store preferences), it works very well. Pity that the WYSIWYG editor only works when creating new posts, not to edit old ones. Not sure what the "Categories" tab is supposed to work, I guess i'll have to RTFM. Who knows, maybe i'll start updating this blog again...