Search Trends - Search Engine Marketing

I can't find the post, but I thought I blogged about something I read recently that said half of all Google searches were unique--that is, that half of all keyword searches are searched on for the first time. In listening to the parts of the webcast recording from Google that I missed yesterday, one of the chief search engineers from Google said that 20-25% of all searches are unique or searched on for the first time. That number seems more realistic to me, but it's still impressive. That's a huge chunk of searches if nearly 1 out of every 4 searches is being searched on for the first time. So I guess if no one is searching on your keywords yet, just wait a few days and maybe someone will search for you tomorrow.