I'm looking to get some more 16x16 tilesets made, this time for a cave and a dungeon/sewer environment.  Details about the project are here:

http://www.reddit.com/r/PixelArt/comments/ic8nt/hello_rpixelart_opengame...

If you're interested, please reply here or contact me with a link to a sample of your work and an estimate.  If you have any questions, feel free to ask! :)

Bart