I highly recommend getting a copy of BlogsOrganizer, this one script will provide you with a boat load of tools and will make your blogging life a lot easier. You can one or hundreds of blogs from the one interface, and it allows integrating RSS feeds (with features like word-replacements, auto-headers, auto-footers, word auto-linking, etc), auto-pinging, auto-posting, auto-reposting and lots more. It does all this with your hosted blogs and freehosted blogs.