Glad you found that post. We're very, very excited about Joomla 3.0, but aren't going to rush into supporting it. Joomla 1.5 development will be over for us with the next big release, and then we'll be focused on J2.5/3.0 exclusively. That will allow us to really clean some things up and take advantage of some new features. Should be exciting, but will take a few months to get there.
In the meantime, as many, many sites (and even Joomla.org recommends itself), 3.0 shouldn't really be used by the average production website. Wait till 3.1 for things to stabilize and more extensions (like ours) to be available in the meantime.
As always, we will have only one subscription per extension, so if you subscribe now, you'll have access to the Joomla 1.5, 2.5, and 3.x versions that are available (or become available) during your subscription period.
Best of luck,
Alex