Given there are 300 pages of posts and it hasnt been released in quite a while.. is there a list of bugs somewhere that I can review?

I am considering adding it into my site but if its gonna be a big
pain in the neck, I am not interested.

How production ready is this beta payment module?

I would be using merchant caculated shipping. I use UPS for international, fedex express and ground in the US, and offer store pickup for NJ residents. I have one product that ships free.
Does it work with zones? for the merchant caculated shipping? How about taxes?

Thanks,
Mike