The two feeds mentioned earlier in this thread:
Do not work. In Tiny Tiny RSS it shows as Red (error) on the left hand pane.
The last stories I got notification of were:
Elemental: War of Magic v1.4 Released! (News Feed - Jan 28)
Fallen Enchantress: BETA 2 Preview (Dev Journal - Feb 17)
When I try and visit the feeds in Firefox I get a strange little blue box and not the normal "Do you want to follow this feed?".
Hope that helps.