FoundryDX is a spiffy site that features mecha--those big anime robots--created out of Lego. Models range from the impressive to the incredible, sporting multiple points of articulation as well as amazing fidelity to the anime versions that inspired the models. The individual who creates the models and maintains the site estimates a collection of more than 30,000 pieces from some 250 sets. For those without quite that many pieces, custom kits are available with detailed instructions for building your own Lego mecha.
(via Destroy All Monsters forums)