I have been getting a number of inquires about Astronics DME Corporation's SATRO PLB-110 "world's smallest and lightest" PLB that we first wrote about back in December of last year (2011) http://www.equipped.org/blog/?p=376. Besides being small, one of the unique features of the PLB was a form factor that mimicked a modern smart phone, making it flatter and more pocketable than existing designs. It was also buoyant, despite the small size, another unique feature at the time. There's been a lot of interest and DME was saying that they expected to reach market in the Spring of 2012, though Spring came and went without the PLB being available.

You may be surprised by what we found when we started digging into why it isn't for sale yet:

http://www.equipped.org/blog/?p=523