I know a bunch of people that read this are working alone, which means your learning alone. I spend all day coding by myself just like this.
I've been in the same spot, waiting for answers on Stackoverflow to questions and searching my brains out. I even took a job with a WordPress company in the hopes of getting code review on a regular basis. Unfortunately it didn't really pan out that way.
Just like the author of the post, I joined a local Ruby Brigade and while most of the other members don't program PHP or WordPress there is still so much to learn. Every time I go out I leave with more knowledge about being a good developer.
To hear some of the smart things I've learned check out this post.