I'd like to suggest to have this link added to the next version of sitemap tool: Alexa Web Search - Webmasters Help

The link brings you to alexa's page which allows you to submit your url to be crawled by archive.org. I've read some where that Archive.org entries helps "proof" age of your site, and in turn helps build trust for search engines to rank sites better; if that is indeed true, this is something webmasters can / should consider doing on an every-other-week basis...