So if you own it, don't upgrade your WP. Before I purchase this I contacted their support because WP 3.0 was released and I was concerned about which version to buy since WP 3.0 essentially eliminates WPMU, so not sure if should be the WPMU version or the regular WP version. I am writing this because people who own 2.9.2 should NOT upgrade their WPMU to WP 3.0 yet according to their support. I was going to purchase the version for WPMU 2.9.2, but was told that the subscription that works for 2.9.2 would be different so I would have to pay twice and that I should wait until the new release, which will be at least several more weeks to release. The problem for me is that if I had gone ahead and purchased it without calling them, in the back end of WP I probably would go ahead with the upgrade of WPMU to 3.0, not realizing that my CorePHP component would not work with it and that even though I just purchased the subscription for a year for 2.9.2, I would be obligated to buy the new subscription for 3.0 (when released). I don't think this is a good business practice not to clarify this to customers, as for me it would be an investment of $198 instead of the $99 for the promised one year subscription that would be useless if I go ahead to automatically upgrade my blog as recommended by Wordpress. At some point I may buy this extension when they release it for 3.0, but feel that for those customers who have current subscriptions for 2.9.2, there should be an upgrade to the new version since sticking with old versions of WP is a notoriously risky business as evidenced by widespread hacking in the very recent past. I think it's crucial for Core PHP to notify their customers NOT to upgrade to 3.0 BEFORE buying the extension. As of right now, after much research on their site and the support person I spoke to, there is no reference to this issue by them.
I can understand your concern, but I would also appreciate if you do not misinform the rest of the users. If you currently own WordPress or WordPress MU for Joomla, you will be able to upgrade to the new subscription for a fee, it will not be full price, nor do we know the full price that the new subscription will be sold at, but it will not be $99 USD as the current subscription for WordPress MU for Joomla!
More information can be found here one our blog post:
I hope this answers some of your concerns.