Good ideas - thanks! Re limiting the number of searches - I'm concerned that people may just register throwaway accounts to get the free searches (and thus nev

Good ideas - thanks! Re limiting the number of searches - I'm concerned that people may just register throwaway accounts to get the free searches (and thus never paying). I could use cookies or IP smarts to counteract this, but it doesn't seem a good solution. I also don't want to make the sign up process harder.