Hello my fellow developers.
A word of caution. This is just my opinion as a two-time participant in DevCup, especially last year's competition. Stay away from any idea that can't be used by a significant percentage of the Evernote population, no matter how innovative or technically advanced you think it is. Take a hard look at every finalist in DevCup 2012. You'll see that the winning apps were all usable by a big percentage of the Evernote user base. This was a sharp and definitive change from DevCup 2011 where the $50,000 first place winner was TouchANote, a really unique and intriguing NFC tag based app that was extremely niche by its very nature since you have to place NFC tags on objects to use it. In contrast, the winner of DevCup 2012 was EverClip, a powerful app and a worthy choice indeed. My reason for pointing EverClip out is only that it can be used by any iPhone user, a huge population, in contrast with TouchANote. Judge for yourself, but if you do a side-by-side comparison between the winning apps in 2011 and those in 2012, and you will see a similar comparative relationship.
I think Evernote does developers a disservice by putting up categories such as Robotics or any other category that is similarly severely limited in its scope of adoption. I don't believe an app in a strongly niche market has a chance of being a finalist and especially not winning the contest. So if you're considering entering just to have fun, or because you already have a niche app that you're dying to adapt to Evernote anyways, then have at it. It's a fun ride. But if you're in it to win it, the heartbreak you save may be your own. This is all strictly my opinion of course.