I just wanted to post up a link to Apple’s Final Cut Pro X Resources Page, with a lot of great information, including supported third-party plug-ins, tools and content. They also discuss and link to FCP X training (web and books) and more. There’s no doubt it will grow as more third-party apps become compatible with FCP X.
Also, here’s an earlier post about Apple’s FCP X FAQ page and more. Lots of great information from Apple!