Inkscape SVG: Download
From Season 2, Episode 22 - Hurricane Fluttershy.
Fluttershy took second place in the poll I posted, so here's a Fluttershy vector from Hurricane Fluttershy. I had to stitch 4-5 frames together in Photoshop to get a full reference shot.
The shadows are on a separate layer in the SVG file, unlike with my previous shadowed Fluttershy vector, which should make things considerably easier for anyone who wants to use this vector without the shadowing. Updated 01/21/13: Tweaked the wing strokes a bit to make them more consistent.