rss-support is more generation than parsing. It works fine although I think it could be made more usable.
Thats sort of beside the point though since you care about
parsing.
We implemented an rss parser in london (Lee Denison did most of the work I think) and I can probably dig up the code. It was a while ago so I am not sure it will do 1.0 or 2.0 feeds for example. I would be interested in seeing a good "forgiving" parser to work with lars-blogger and do aggregation of the feeds I read.