Short list of open-source hardware related events:
Regular Meets:
* Open Source Hardware User Group: London based OSHUG frequently organizes related events, please keep watch on their site and mailing list.
* Maker Faire Multiple events
* Computer Club of India DIY Electronics Meet ups at Bangalore, India
* Noisebridge San Francisco, US
Upcoming events:
2012
* Embedded Technology Conference 16 & 17, February 2012 at Costa Rica
Past events:
2010
* A workshop on legal tools for Open Source Hardware 17th March 2010 at New York, US
* Sketching 10 23-25 July 2010 at Los Angeles, US
* Open Hardware Summit 24 September 2010 at New York, US
* CELF Embedded Linux Conference Europe 27 & 28 October 2010 at Cambridge, UK
* Chaos Communication Congress 27-30 December 2010 at Berlin, Germany
2011
* FOSDEM, 2011 5 & 6 February 2011 at Bruseels, Belguim
* Embedded Conference 21 & 22 March 2011 at California, US
* Embedded Linux Conference 2011 – San Francisco 11-13 April 2011 at California, US
* Freedom for Hardware and Communications 14 & 15 July 2011 at Barakaldo, Spain
* Open Hardware track at OSCON 2011 25-29 July 2011 at Portland, US
* Sketching in Hardware – sketching11 29-31th July 2011 at Philadelphia, USA
* Hardware Hacking at Chaos Communication Camp 10-14th August 2011 at Finowfurt (near Berlin), Germany
* Milk Labs ARDUINOFEST 27 August 2011 at Limerick, Ireland
* Open Hardware Summit 15th September 2011 at New York, US
* OSHW Con 2011 23-25 September 2011 at Madrid, Spain
* Maker Faire Africa and the Three-Day Maker Space 6-8 October 2011 at Cairo, Egypt
* Open Hardware Workshop 9th October 2011 at Grenoble, France
* Embedded Linux Conference Europe 2011 26-28 October 2011 at Prague, Czech Republic
* Open Source Hardware Camp 27th October 2011 at London
* Create Art and Technology 4-6 November, 2011 at Berlin, Germany
* Chaos Communication Congress 28c3 27-30 December 2011 at Berlin, Germany
2012
* Control things with the Arduino! workshop 6th January, 2012 (Repeat on 13th) at Hackerspace, Singapore
Related events:
Upcoming related events:
2012
* Embedded World 28 February – 1 March at Nuremberg. Germany
* OSCON 2012 16-20 July 2012 at Portland, US
Past related events:
2010
* Foss.in 15-17th December 2010 at Bangalore, India
2011
* Open Hack Day 30 & 31 July 2011 at Bangalore, India
* Linux Plumbers Conference 7-9 September 2011 at Santa Rosa, USA
* China Open Source Week 11-17 October 2011 at Beijing and Nanjing, China
* LinuxCon Brazil 17 & 18 November 2011 at São Paulo, Brazil
2012
* linux.conf.au 2012 16-20 January 2012 at Ballarat, Australia
* FOSDEM 2012 5-6 February 2012 at Brussels, Belgium
Contest:
Current Contests:
Sorry, No on going contests 
Past Contests:
* Open hardware guitar design contest
* WyoLum Innovation Grant 2011
Journal/Magazine:
* Open Hardware Journal Issues: Nov 2011 Feb 2012
Hardware Start-up Accelerator:
* HAXLR8R 111 days startup accelerator program which is focused on providing hardware-based start-up
Please Note:
If you are organizing or know any open source hardware related event, please let us know at info at allaboutopenhardware dot com
