I use the CMS called CMS Made Simple and a module it has to parse RSS feeds to HTML (or any code really). It uses
MagpieRSS for parsing the RSS feeds.
I haven't really tested enough yet to compare to other methods, and I'm not much of a programmer anyway. :) I guess it depends on if you use a CMS or just fetch the parsed XML directly to DS Player.
Will check out biterscripting.