Using Mac Mail as an RSS aggregator

As I was exploring options for RSS aggregators for my Mac, I found a nifty way to do it within Mac Mail under 10.5 Leopard.

1. In Mac Mail, choose File > Add RSS Feeds...
2. In the dialog box, paste in a blog URL (http or feed) and click Add. Repeat for all blogs.
   
3. To aggregate the feeds, choose Mailbox > New Smart Mailbox...
   
4. Type in a name for the smart mailbox, and create a rule to find messages with a type of RSS Article. 
   
5. Click OK. The smart mailbox will contain messages from all subscribed RSS feeds in Mail. :-)