Ive been intermittently using the ScribeFire: a Firefox extension blog editor for about a year.
The "release fast and often" strategy is fashionable now, but ScribeFire is a good counter-example.
It still only shows recently used "labels"/"categories" from blogger. It still doesn't handle blogger's line wrapping correctly.
These aren't subtle things, and they aren't new. They've been present from day one.
Windows Live Writer is proof that, given sufficient genius, these problems are solvable . Release often is not a panacea.
 WLW is also proof that there's life at Microsoft. Nobody has released anything comparable for OS X.