By Dragoneex. Check out the 'making of'.
A picture of a 19th-century Blender prototype has been dug up by Stanislav Šestić.
Riofranco shares this awesome Yafaray render (high resolution version here). A tutorial is in progress.
A wonderful set of images by pokestuff. Check out the full series on BlenderArtists.
By Square. See the full-resolution version here.
A wonderful light study by sixthlaw.
A wonderful Cycles render by Andreu Cabré.