OP: You should find a credible way to pay for this, and publicize how you're doing it. Online bookmarking especially has seen a lot of services come and go, and

OP: You should find a credible way to pay for this, and publicize how you're doing it. Online bookmarking especially has seen a lot of services come and go, and people are skittish about putting their bookmarks into a new site with no guarantee they'll stick around. You may find that having a credible revenue stream actually attracts people to your service. (Disclaimer: I'm your competitor, but this is sincere advice)