Arduino 0018 Improved support for third-party hardware

Given the increasing numbers of boards and microcontrollers to which people have ported the Arduino core libraries, the team wanted to make it easier to add third-party hardware to the Arduino development environment. The recently released Arduino 0018 (download) adds support for the installation of contributed cores and board definitions within the Arduino sketchbook folder. This saves you from having to dig around within the Arduino application as was required in previous versions and also ensures that the boards will remain when you upgrade to newer Arduino releases.

For more informations visit their blog entry and the download page and start tinkering!