How To Get An Animated Twitter Avatar
Most of the time animated GIFs don't work with Twitter. But F.A.T. Lab's Greg Leuch (creator of Shaved Bieber) has found a way.
Advanced Instructions (How It Works)
1. Find your imagery (or use 3fram.es to make an animated GIF and save to your computer).
2.Import your animated GIF into Photoshop (details), or create your animation from still frames.
3. Resize your image to a 48×48 dimension (the secret dimensions!).
4. Save for Web as a GIF, tweak your colors, and save.
5. Upload to your Twitter profile!
More info on FAT Lab.