Appcelerator and IDC released a survey this morning of mobile application developers, and the report is a must-read for anyone in the space. All Things D notes that developers are shifting their attention from the aging BlackBerry OS to Windows Phone, which will get a big boost in the coming weeks thanks to new Mango handsets and the backing of Nokia. But ReadWriteWeb offers a deeper piece on the report here, examining the “mobile relationship lifecycle” of reach, engagement, loyalty and monetization. If you’re a developer, download the full report here and refer to it often as you build your applications.