RSS Anywhere

I think I've found the perfect solution for reading RSS feeds:
NewsGator + NetNewsWire Lite

This combination allows you to read and store your RSS subscriptions online using the NewsGator service, but also sync those subscriptions with a desktop application. It also syncs which entries you've read in each feed.

The main advatage to this is that you can read your feeds from multiple computers without having to duplicate your list of feeds or loose track of which items you've already read.

Of course you can always purchase the full version of NetNewsWire, which has a built-in Web browser, or purchase FeedDemon for the PC.