best ways to recruit volunteers for a PHP framework

Hi everybody, I have developed an ORM framework in PHP for the last 2 years and it's becoming a more professional and nice solution so before doing a new complete revamp I am going to look for volunteer developers to do a real good version. But I am wondering what would be the best and clearest way to present the project in order to get some people interested in it ? I was thinking about - showing the previous versions - showing use cases - showing unit testing (I'm doing test driven development) - a short user manual (the project doesn't have any user manual yet!) Thanks in advance!