I'm testing a new software called Qumana a blog publishing tool. I like the interface with few exceptions and its cool that I don't have to login to either of my blog management consoles to quickly create entries. It has spell-checking (with suggestions on misspelled words) and formatting (when your blog allows it). You can also easily edit/delete existing entries from the Blog Manager console.
Haven't used the "Insert Ad" or "Insert Tags" features but perhaps I'll post again when I've done some more poking around.
Very cool!
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Blog Tool