Just released http://gemcutter.org/gems/penso-feedbag to discover feeds for specific website, with proper charset, a fork from muck-feedbag, which was a fork from feedbag.
Yes, I love Ruby, Git, Gem and GitHub.
>> require 'feedbag'
>> Feedbag.find("http://lemonde.fr")[3]
=> #<struct Feedbag::Feed url="http://www.lemonde.fr/rss/sequence/0,2-3224,1-0,0.xml", title="Le Monde.fr: Société">