GRis (Google Reader iPhone Sync) ..is an RSS feed reader for the iPhone. There are already a few available, but this one features:

• It syncs with Google Reader. So items you read will be marked as read, and you can star or share items to come back to them later.
• It saves images in feeds for offline viewing. Surprisingly few iPhone RSS readers do this, which sucks if (like me) you own an iPod Touch.
• It's free and open-source. Visit http://code.google.com/p/gris/ for more info.