I'm a self-taught, lone developer working in a range of languages. (PHP, Python, Ruby, and Objective-C.) I'd like to be able to submit my code to a person or small team with more experience than me, then receive suggestions both to improve it and to read up on subjects that might improve my code in the future. Ideally, I'd like this to be a mentoring-style relationship that results in my code quality gradually improving over time, but at a faster rate than I could accomplish alone.

To date, I have found several companies who offer code review services to large organisations for the purpose of security and performance audits. I have also found websites that offer feedback for small, specific snippets (e.g. http://codereview.stackexchange.com/ ). But I haven't found any services aimed at reviewing whole projects to help and educate programmers with a genuine interest in improving their own abilities.

Has anyone else come across such a thing? If no such service exists, what options are there for peer review when you're not working in an environment with other developers?