I currently use netvibes too. to customize rss feeds.. i use Yahoo Pipes. You can provide bunch of feeds to pipes, then add custom filters, sorts, terms and gen

I currently use netvibes too. to customize rss feeds.. i use Yahoo Pipes. You can provide bunch of feeds to pipes, then add custom filters, sorts, terms and generate a custom RSS address. Add this address to netvibes. and with this process, you will hardly ever visit any of the homepages except netvibes. Nice project though.