First you should check your robots.txt if you see: User-agent: ia_archiver Disallow: / User-agent: ia_archiver/1.6 Disallow: / Code (markup): delete this. afterward go http://www.alexa.com/help/webmasters/request_bot.html write your web sites name and push crawl button. indexing generally takes 6 months
Why would that Alexa crawler do anything for Archive.org? This is a good topic though - there is so little information about how to get archive.org to notice your site. Only my oldest site has been cached by it. My 2 and 3 year old sites have not been spidered by it whatsoever, and it's frustrating...