Well to start, there is, as always, a great number of 3D printers this year. MakerBot has produced a new model with a much higher level of detail. There are new companies with their own printers, trying to reduce the cost of producing the device. There was even a printer large enough to print a person inside of.
Arduino continues to have a large presence. There are more and more companies either trying to create shields, add-ons that capitalize on the device's popularity, or create an Arduino clone based off another processor. Parallax is one such company, trying to add shields to their current lineup of products. A PIC based Arduino system is being worked on by another company, which looks promising; anything that can make PIC more bearable, is a good thing. The Arduino Due, the ARM-based Arduino, is going to be released in a few weeks.
There seems to be more items to aimed towards the younger maker audience this year. Activities, trying to get kids involved, painting, alternative energies, even Disney's Phineas and Ferb were there to greet the kids.
All in all, a great way to spend the weekend. I will be posting the details for the DIY oscilloscope tomorrow, so stay tuned for that.