Since Mac OS 10.6, the power of Cocoa can be brought to bear into Applescript. This includes the ability to compile true applications from within Xcode complete with all of the interface elements previously only available to pure-Cocoa developers. This hybrid environment comes with its own unique caveats and is missing some crucial functionality within Xcode—like the ability to step through code when debugging—but it does breathe new life into Applescript (not that AS really needed it).
- AppleScriptObjC Explored by Shane Stanley - Really great introduction into the workings of ASOC, the reviews on the site are spot on in terms of quality (but the layout of the book makes is unnecessarily hard on the eyes).
- ASOC MacScripter Forum - Nothing beats a forum for drilling down into specific problems