Interesting tidbit that was Slashdotted earlier – Netcraft has released an anti-phishing toolbar that leverages the enormous database of web sites the organization manages.
It allows for reporting of fraudulent sites (which are reviewed by Netcraft prior to inclusion into a databases tracking phishers).
A Firefox version is under development, so it is only available for IE right now. I may just have to fire up Virtual PC and check it out.
They are offering to private label the toolbar for interested companies who want to distribute it under their own brand (I am sure for a cost).