If you managed to get a YC invite with no registered company, then I suppose you could wait on everything (and hats off to you in that case :)) If you end up n

If you managed to get a YC invite with no registered company, then I suppose you could wait on everything (and hats off to you in that case :)) If you end up not getting into YC, though, I'd say go ahead and register the company anyway. You'll need it in order to take angel money or give out stock options.