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bill - 8:07 am on Mar 29, 2009 (gmt 0)
I'd offer a combined feed as well for the people who want everything.
If you have enough varied info and you think it would be of interest to your users then separate feeds can be a good idea. Many news sites do this so that you can subscribe only to the feeds you want. Ex. I may want the Tech News feed, but I could care less about the Sports feed.