As predicted just a few days ago, the new Finding Nemo Open Edition MagicBand is not available in the Magic Kingdom. Cost is $19.95 and this band is not limited or special in any way other than it being a new graphic MagicBand. The bands depict Nemo, Dory, and Squirt. Eventually these will be released in other places throughout Walt Disney World.
Thanks to Twitter user @Schmoofy for the tip and picture.