This is not a post about what happens when Google goes away - because we all know that won't be happening for quite a while. What this post is about however is where users go after they search on Google. It should come as no surprise that Web users query Google for what they need at a specific time but how about after that? What do they find? What they are increasingly finding are alternative search engines - and we're not talking arbitraged landing pages. Once users find a site, service or resource that they appreciate and find value within from any of the big search engines (Google, Yahoo, Ask, MSN's Live), will they return to it? Well yes, of course they will! Read Write Web has an excellent post today on the Top 100 Alternative Search Engines. Everything "cool" in search is covered; search homepages, articifical intelligence, clustering engines, reccomendation engines, metasearch engines and more. These are all good places to consider if you're targeting the long tail and secondary impressions from various content specific networks.