Ken Robichaud has created these awesome, full-sized Avengers props in Lego: Thor's Mjölnir, Captain America's shield, Hawkeye's bow and arrows and the Black Widow's thingamajigs. They are perfectly made. The arch even bends like the real thing! (nerdy scream).
My favorite is that Captain America's shield. I'd love to hang it in my apartment. [Flickr]