I am now taking requests for redstone devices of almost any nature. I specialize in command blocks and mini games. I am working with Minecraft 1.5 but can use any version that is needed. If you are pleased with my work then I would appreaciate if you give a donation, but it is not necessary.
An example of my work can be found here:
http://www.planetminecraft.com/project/pvp-arena---capture-the-flag/
and a much older version can be found here(1.3):
http://www.planetminecraft.com/project/paradicecraft/