Alexander Makarov, recently gave a presentation at the Yiiconf 2012 (note that site is in Russian) titled “Yii2, What’s New“. In the presentation, Makarov, one of the core Yii framework developers and the author of the Yii 1.1 Application Development Cookbook, discussed both Yii’s current status and the expected changes in the upcoming Yii version 2. I believe that an alpha version of Yii2 will be out later this summer (and, in fact, I’ll be coordinating the writing of my Yii book with the release of Yii2).
The presentation quickly explains where Yii current stands, how Yii got to be here, and where Yii is going in the future. There’s even a reference to yours truly!