RSS is a great thing and I've quickly become adicted to the aggregated newsfeed that I get inside Radio. Still, I'm looking for something more. In fact, what I'm looking for is a commercial service one can buy from Moveover.com.
Admittedly, I'm not an RSS expert, but I've looked around a bit and it seems that its missing some critical pieces, like filtering, redundency elimination, etc. The technical architecture of moreover.com shows some of those features.
As an example, I'd like to put a gadget on my weblog (like the Google box) that is an aggregation of RSS feeds from various technical news sources (like ZDNet, Inforweek, etc.) filtered by keyword. Doesn't seem like building a filter for RSS feeds would be a huge job. Maybe its time to break out my toolbox and code a little.