UPDATE: Ludum Dare has now
I made a post about this the last time the 48 hour game development competition 'Ludum Dare' was hosted, and it was great to see so many GameMaker users get involved. Nearly 1000 games were created in just 48 hours, based around a community-chosen theme!
On April 20th-23rd, Ludum Dare is hosting it's 10 year anniversary event, and this competition is bound to be the biggest yet. Developers can enter using any tool, including GameMaker which has proven to be particularly suitable for this type of event.
It's an amazing social experience that is entertaining, challenging, and unique. Both novice users and pros can take a lot away from this competition, and having entered myself I would highly recommend it for all.
Check out the Ludum Dare website for more information.
I hope to see a LOT of you there...this year Ludum Dare will be massive, it's something no game developer should miss!