I've been working on a hexacopter project for the last few months and finally got it completed and flying.  Specs for my hexa are listed below.  It has been a fun project and I am impressed with the Ardupilot 2.0 Board & Arducopter Software thus far.  Special thanks to all the people that have contributed to the arducopter wiki as the information and comments there helped immensely as I was getting my hexa together.  I just flew my first fully autonomous flights (takeoff, nav point, landing) this weekend and although I was pretty nervous to have the board making all the decisions the testing turned out well.  I'm still getting used to some of the mission planning specifics but have been having fun learning.

Frame: 0.063" Garolite-G10/FR4 cut on Phlatprinter3

Booms: 16mm OD aluminum
Boom Blocks: quadframe.us 16mm boom blocks
Flight Control: ArduPilotMega 2.0 Board & Case
Software: Arducopter 2.7.1
External GPS: uBlox LEA-6
Sonar: MB1200 XL-MaxSonar-EZ0 Ultrasonic Range Finder
APM Telemetry: 3DR Radio Telemetry Kit - 433 MHz
Motors: 6x Tiger MT-2216 900kV
ESC: 6x eRC "Rapid Drive" 25A Brushless ESC
Battery: 3s-5000mAh
TX: Flysky 9x w/ ER9X firmware with Frsky DJT Module & FLD-02
RX: Frsky D4R-II RX using CPPM

Weight with battery, no camera = approx 1.7 kg