I am subscribed to my bank statement in FeedDemon. Everytime there is a new transaction posted to my account - I get a nice new item in FeedDemon.
No, my bank doesn't offer such an RSS feed (wish they did offer an authenticated feed though, it might cut down on phishing emails too). Instead I use RSSBus which is running locally on my desktop. RSSBus comes installed with a set of Open Financial Exchange (OFX) operations, which give me information about my bank or credit card statement. So with one http://localhost URL - RSSBus connects to my bank securely, uses the OFX standards to retrieve information about my account, and pushes that information out to me as an RSS feed. Very handy.