You actually feel more motion of the pods on the Green Side in Mission: Space, although you don't feel the G's.
As for Star Tours, I think this rumor has been around since only after a few years from when it opened. With every prequel that has come out, rumors have kept resurfacing; A Pod-Racing Sequence, A trip throught Coruscant, Flight over the Lava Planet Mustafar...it just keeps coming. Supposedly George Lucas did say at a Star Wars Convetion, I think it was at Celebration III when Episode III came out, that he intended to revamp the ride, however, he didn't mention whether this would be a new ride, or an upgrade to the version that already exists.
Basically for Star Tours, both Disney and Lucas have to agree on the project, and a budget needs to be set. Until then, nothing will happen. But I do suspect we'll hear something in the coming years.