As seen on the IonFX Web Page, IonFX have announced the sequel to GeoRally 2005, Overdrive: GeoRally 2 and GeoRally EX. GeoRally EX is designed for VGA Pocket PCs using the 2700g 3D graphics chip. (Currently only the Dell Axim X50v has one.) No word on pricing or release date. You can read our review of GeoRally 2005 here.
Here are some screenshots from GeoRally: EX. NOTE: They have been resized from VGA to fit better. You can click on the image to enlarge it.