The Online Math Open and the National Internet Math Olympiad have been serving us continuously with competitions recently - for the last couple of years. However, science has been behind in this. The Physics equivalent of the OMO and NIMO is finally here! The International Physics Online Olympiad, founded by myself, is up all just for you. Visit our website at www.onlinescienceolympiads.org to find out more. All you have to do is go Contests -> Register and you can participate in any upcoming competitions. Note that you only have to register once and you do not have to participate in all competitions. The Registration is done for you to be able to participate securely in the competitions you want to participate in.
In our website, you will see, at the top-right, Facebook and Twitter links, where you can follow us for updates on upcoming competitions. Some of our contests will have prizes, like certificates and T-shirts. We also have a forum on ArtofProblemSolving.com (forum #991) for problem discussion: http://www.artofproblemsolving.com/Forum/viewforum.php?f=991
Feel free to comment here for questions! Hoping to see you at the IPhOO.