refactoremycode.com is another new web 2.0 service, this time aimed at helping programmers at receiving comments and feedback to enhance their code.
It works in this way: you are unsure about a portion of your code, or a library you are writing; so, you can upload it to the refactoremycode repository, and the other people, driven by a 'web 2.0 - free software' philosophy, will have a look at it and give you their suggestions and comments and feedback.
Here is the link: http://refactormycode.com/

