You'll find that people are less responsive to such a post when you're brand new to a forum and
haven't introduced yourself.
There's a lot of Apple-related topics you can mine for your logo… try sketching ideas on a pad -- even if they're awful or silly. You'll be surprised how quickly you can get into a stream of consciousness and a good idea can materialize. Besides, it's better if you do it yourself, anyway.
Don't be afraid to post them for critique, there's a lot of pros here who can offer solid advice.