A demo for Resident Evil Revelations has appeared on the 3DS eShop today. You should play it if you get the chance, but whatever you do, don't try the demo more than 30 times -- Reggie Fils-Aime's top men will hunt you down.
Yes, in a bizarre twist, the Revelations demo is restricted to 30 "uses." When attempting to initiate the software, a message will pop up saying as much, which has me thinking this could be standard across all demos. If so, Nintendo is really stepping it up in solidifying itself as a company unwilling or unable to adapt to straightforward concepts in this industry.
We'll find out soon enough; a demo for Mario & Sonic at the London 2012 Olympic Games is planned for January 26, followed by demos for Rayman Origins and Metal Gear Solid Snake Eater 3D at a later date.