Yes single sign up and login portal. All in once irregardless of which campaign, like bountyhive. They have pretty go interface. I hope your portal will be too. Do announce it here once it's up. We need more portals like this!
Yes! It will be up in 2 days.
Bounty hive portal is not automatic, At the backend, they are doing manual work. But our bountyportal is completely automatic. Using Facebook and Twitter API to collect data.