I'm planning on getting a Haswell-based NUC in the short term and was considering getting a 3rd party case that would have either a better or different cooling solution. After scouring the web for a while these are all I've been able to find, and none of them seem to be available for purchase.
Akasa:
Logic Supply:
LGX ML320 Ruggedized Fanless Haswell NUC Case | Logic Supply
Impactics:
Silverstone:
PT 15, PT16, and PT21 - no details yet except that they were shown at CES 2014
Streacom:
Tranquil PC (includes NUC board):
Are there other cases out there I'm not aware of?