Is there any decent Wordpress blogging client for Mac?
Solution 1:
You have basically two choices, both payware:
Marsedit
$39.95: "The best way to write, preview, and publish your blog."
and
Ecto
$19.95: "ecto is a feature-rich desktop blogging editor for MacOSX"
Both programs offer trial versions.
Solution 2:
You might consider Flock, a free, Firefox-based browser with many other features, including a built in blog editor. It's quite an unusual program, as you can also use it to manage your Facebook and Twitter accounts and feeds. It's worth a look.