Lightroom 3 resources

There is a huge supply of Lightroom 3 resources. Among them, I found the following extremely useful:

• Free video tutorial from Peachpit.
• NAPP Lightroom learning centre -- It is not cheap, but many of them are useful.
• Jeffrey Friedl's Lightroom plugin page.
• The Lightroom Lab.
• The Lightroom blog.
• Lightroom Secrets.

There is an official Lightroom forum, but I find that the unofficial one is sometimes more useful.