UPDATED on 2009 January 20 with ten new ones. Perhaps I should have called them "Plastic Letters". The last ones have glow and transparency effects. I placed a background to show it better. Specular light added to some of the contour effects. A little bit grainy because of Inkscape specular light limitations, but not a too big problem. Well adapted to small filled shapes too. Colorizable. Modifiable.
I created the birds in illustrator CS3. It is completely vectorized. If you have any request that want to be included to the pack, just write it in comment.