I'm not seeing any indication on the site that it will stop being free in January (the only mention that it might stop being free is in the most recent blog pos

I'm not seeing any indication on the site that it will stop being free in January (the only mention that it might stop being free is in the most recent blog post, which only says that the "beta period is absolutely free"). You might want to mention that somewhere, preferably somewhere obvious, to avoid accusations of bait-and-switch, or similar things (whenever companies raise prices without letting all existing accounts keep the original pricing structure, people get really angry, at least on HN). I would also recommend saying what you expect the pricing structure to be when you come out of beta, so that potential customers can take that into account.