I've been testing it already several times in Paris and again just now, amazingly when you're working in a space covered by a wifi network, say in any public place as airport, hotel etc..., it's usually possible to refresh your RSS feeds even if you don't connect yourself to the network.... !
Seems like wifi hotspots securisation "don't see" RSS readers uploading the feeds, so another good reason to have a RSS reader... ;o)
I was expecting to work and get a 30 min. connection pass while waiting for a meeting, unfortunately (or one more time) my provider is temporary unavailable (shame on you SFR...), so I launched my RSS reader ( I am using NetNewsWire by the way...) and it's working ! I can read all my favorites blogs !