I need somethings to be clear regarding GSOC Proposal

1. Will I have to propose a new Idea and give my own title to it? Can I work on Mentors Ideas?

2. How do I get connected to irc, directly via skype or such messengers or will I have to create a new id for that?

3. Additional Info: Will I have to collect data of how my idea is to be implemented or how it would look after implementation, from any other site?

Please inform me about proposal, I want to give my proposal as soon as possible.
                              Thank you,

Akhil Ennu