You have a very interesting project. It will be my pleasure to follow future development.
There is something that bothers me, though... How do you plan on keeping the list clean of scammers and phishing sites?
By the way, 'vote down' option is a good suggestion as long as it is limited to one vote per visitor.
Well, all the links that are submitted by visitors have to go through me. It doesn't automatically post in the site.
One "Vote down" per visitors makes sense, right now it's one "vote up" per visitor to avoid misinformation.