Canuck,
I don't know if any other God's Foot songs will see the light of day. Supposedly, she has said that they have a ton of songs she has recorded that won't be released formally and this would be a good way for them to see the light of day.
"Stupid Thing" is a good example. It was recorded around the Beautiful Creatures recordings with Andy Chase of Ivy producing and playing added guitar. It is a great song, but it only appeared on some promo. that was not released to the public.
BTW, she has a album ready to go for eraly next year and is ready to record the next Some Girls material sometime after she is finished with the tour.