For me it was the "Save for Web & Devices" that stumped me at first. Because even once you get it imported, it seems all but impossible to save it as an animated .gif. It lets you export to any filetype, or regular save as a ./gif that is not animated, but the animated .gif type is ONLY available in the "save for web & devices" window. Maybe they fixed that silliness though for CS4, I have only done it in CS3.
Glad its wokring now. I really keep meaning to look into GiMP too,
Chris