I notice with OS X 10.5 (Leopard)’s new Mail integrated RSS reader, once I have a feed there’s a few minor annoying limitations that aren’t available.
1) While I can review what the RSS feed URL is by hovering over it, I can’t copy it to the clipboard.
2) If the RSS feed location changes, I can’t change the feed’s URL.
3) I’d love to be able to drag the RSS icon to a browser and have it open the page.
4) Or, I’d like to be able to right click the feed and have it open it in a browser or my default RSS reader (NetNewsWire).
5) Drag the RSS feed icon, or an article from the feed, into an open Mail message to share the URL.
I hope Apple will enhance the feature capabilities soon.