I recently became aware of a new company specialising in software for scientists Shazino have developed a number of interesting applications for both Mac OS X and iOS.
The best known app is PaperShip an iPad, iPhone, and Mac application designed to help you keep your articles organized with your Mendeley or Zotero library. However they also provide a couple of smaller apps that make life easier in the lab.
The latest addition is an electronic labNotebook called Hivebench, this is available for both MacOSX and iOS. Looking at the website it seems to be aimed at molecular biologists/biochemists, and there is a free version that allows unto 10 scientists to collaborate.