Having a similar problem, my button works, but when the popup window appears it never loads, the loader graphic just spins. This was working fine less than 1 week ago, I haven’t made any WP upgrades since then (I’m on 2.8.4).
I too am experiencing this issue. Clicking on the Submit button does nothing. This is a new plugin install on an existing WordPress installation.
I’d love to use this plugin, it’s fantastically implemented 🙂
That or get in touch via the plugin site (blograndom.com) and give me publisher access to one of your test blogs that it doesn’t work on and I’ll do my best to figure it out asap.