Is this YC's algo?

Submission hits New/New submission is graduated based upon a set level Level can be found by the following ...

Points count, but they count more when given by a user with higher Karma

Comments count, and might be weighted by karma of those who left them (to help rank the overall submission)

Time between comments, probably counts, although this is a little neglected with some stories on the main page have no comments.

(update) Sites that have made the front page before (or frequency) might have a "trusted" status and the level needed to obtain the front page lowered.

Pg, anywhere close?