http://saa2010.mirtesen.ru/wall/rss
http://feedvalidator.org/docs/error/SAXError.html
http://feedvalidator.org/docs/warning/UnexpectedContentType.html
http://feedburner.google.com/fb/a/addfeed
http://httpd.apache.org/docs/1.3/mod/mod_mime.html#addtype