Here's my "phishing" contacts.
<email@example.com>, <firstname.lastname@example.org>, <email@example.com>, "antiphishing dot org" <firstname.lastname@example.org>
Phishtank is largely "report only" - as in they don't persue any of it, but they do make the data available to companies who are victims (PayPal, ebay, the banks, etc...). AFAIK, you have to be a member for that address to accept your submissions.
I'm thinking US-CERT must participate in take-downs ;) Since a lot of these tend to use hijacked hosting or hacked webservers.....
coldrainnet/knujon - afaik uses their data for "brand protection" - and also distributes the phish submissions to the responsible parties (the trademark owners; i.e. the banks/paypal/ebay)