For full details about Lyra's List submission, look here. If you just want to know how to submit if you are looking for a project to work on, have some modified copypasta below.
You can write up a quick resume-like document (in Google Docs) detailing skills, experience, preferred genres, etc., so prospective devteams would be able to contact you if you fit their needs. This is preferred, but it is also acceptable to link to a site that contains work that you've done (your DeviantArt account, for example). Send the link to me at email@example.com, with the word GDD somewhere in the subject.
Be sure to include the following in your email as well: your name (what people call you on the ponynet), and what your primary talent is (programming, background art, spriting, music, script writing, level designing, or anything else).
Just a reminder; all submissions for Lyra's List #3 are due June 30, 2012. That's all folks.