Have a Favorite PowerShell Resource?

Whenever I teach a class, I throw out a LOT of URLs for my students. It's becoming a bit difficult, in fact, for me to fit 'em all on slides or for students to keep up. So I just put upShellHub.com, which I'll use to list real, useful PowerShell resources on the Web. If you've got a favorite PowerShell resource that you've bookmarked and rely upon frequently - please let me know. Contact instructions are right on the site. I really appreciate it - you'll be helping other folks who are learning PowerShell, too! If you prefer, you can send me suggestions via Twitter - just tag your post with #shellhub. No need to send directly to @concentrateddon, although you can do that as well if you like.