nk497 writes "The Metadata Analysis and Mining Application (MAMA) doesn't index content like a standard search engine, but looks at markup, style, scripting and the technology behind pages. Based on those existing MAMA-ed pages, 80.4 per cent of sites use cascading style sheets (CSS), while the average web page has 47 markup errors and 16,400 characters. Should you want to know which country is using the AJAX component XMLHttpRequest the most, MAMA can tell you that it's Norway, with 10.2 per cent of the data set."
is available at Computerworld, and a deeper explanation
is up at Opera's Dev site.