Oh I still love goofing off with Photoshop tutorials whenever I get a chance! I always learn something new, and I enjoy using what I learn to make new desktop wallpapers.
If I'm looking for something specific, I'll google it and see what comes up. More often than not, though, I end up at tutsplus. It's definitely my go-to.
The WordPress class sounds interesting. I wonder how deep they go. I've been using and modifying WordPress for years, but I've never gotten granular enough to build my own themes and add-ons.