ImageReady can do animated .gifs. Am I simply unaware that PS can do animated .gifs by itself, or was there something I missed?
That said, SapphireStar, you may want to increase the view time for every frame, except for the last, by 200% or 150%. Double-time or one-and-a-half. I imagine that would give your text more visibility time. Failing that, just increase the time for the one frame with the most opaque text. Play with it some and you'll be fine.