FeedYes is a serious attempt to solve the difficult task of grabbing content from any website and turn it into an RSS feed. Other tools of interest in the same category are RSSxl, Feed43, FeedFire, MySyndicaat, FeedTier, Grouper Evolution, the HTML-to-RSS widget from Desktop Sidebar and RSS Wizard.
You can also ask Carlo Zottmann of FeedPalooza to do it for you. I highly recommend his services.