When it comes to those of you utilizing sponsor hosted rss feeds on your blogs, how often do you like to see them update? Do you prefer daily updates or longer periods of time for new posts to appear?

Right now im toying with the idea of addiing feeds that update every 3 or 4 days, for the simple fact that i feel if a feed updates more than that, it will oversaturate a site in the eyes of the surfer, have any of you folks done any testing on this type of things with rss feeds and how often they update to see what time period works best?

Regards,

Lee