iMovie plugins

Among the many strange choices made with iMovie '08 is the lack of plugins for the program. I have a few plugins for previous version of the program and always wanted a few more if I could afford them. It's not clear whether or not there is a way to create plugins for iMovie '08 or not. The other thing I'm not seeing is a price cut on the plugins for the older versions of iMovie. If that software isn't going to work with the new version, the customer base for the plugins probably isn't getting any larger, so a nice discount on the plugins might spur some sales.