No but consider what this would require based on Apple's design of the push notifications system. You can not individually connect to it for a particular app so there would have to be a server that did the real aggregation and pushed you notifications. There are a few potential candidates for this service like newsgator and google reader but it seems neither are acting on it immediately. I would expect to see it from newsgator (who has NetNewsWire on the phone) if anyone did it though.
The only alternative I can think of is something like Prowl accompanying NetNewsWire on your mac at home to send notifications to the phone.
Personally I don't mind this situation because I use RSS for exactly the opposite reason I want to be notified of things. I want my rss aggregation to reduce the time I'm spending focused on random internet crap So the last thing I want is to be reminded immediately that I have things to read, or I might stop to read them.
But I realize some people use rss aggregation for things that are more notification-worthy like server status or work stuff... so maybe keep an eye on NewsGator.
See this thread for a solution to push RSS feed updates using Prowl, you would still need a proper feed reader to read the actual article but at least you will be notified when they are updated.