bill - 12:21 am on Sep 27, 2007 (gmt 0)

You're on the right track and it seems that your thinking is exactly what most feed subscribers would want from a feed. If this is an active feed and you have many subscribers looking to keep up with your information I don't think it is going overboard to add updates as well as new items. That's your call though as you could go either way.

You can certainly cull older items from the feed. There's really no need to have much old content in there. With an active, constantly updated feed I'd set a regular schedule to clean things out. However, there's no harm in leaving items there either. Your users can set their aggregators to show the range of data they want.

Keep in mind that you can also offer multiple feeds. Some sites will offer different feeds for different topics or categories and still offer one all-encompassing feed that contains everything.