After a brief delay, Nintendo rolled out the latest 3DS firmware update worldwide. Firmware 3.0.0-5U adds several features, including 3D video recording (in 10 minute increments), a sequel to Find Mii, and the ability to transfer software to another 3DS system.
The Mii Plaza received its fair share of enhancements such as SpotPass support, more puzzles, and a music player. A new Accomplishments system keeps track of goals you've met through Find Mii and StreetPass trades.
If you have a Japanese 3DS on hand, you can download demos of Dead or Alive Dimensions and Monster Hunter 3G from the eShop. Nintendo has not yet announced when demos will be available in other regions.