Just wanted to say thanks for featuring the 'Man of Steel Lego Mosaic' from my website at http://www.thecreativebrick.co.uk
Plans for mosaics we've created (or the ability to create your own) are in the pipeline but no timescale at the moment.
The problem with releasing plans for mosaics based on images like Yoda and Superman are that I've no wish to get jumped on by copyright lawyers - so these will probably remain 'showcase' examples only I'm afraid. Also my intention would be to sell plans for a reasonable fee, perhaps $10 for the 48x48 mosaics ? - you'd save much more than that in parts as our mosaics are designed to use the largest plate sizes that fit - not just 1x1 plates).
The Creative Brick Company UK.