Gamasutra - Features - "Dealing With A Fragmented Java Landscape For Mobile Game Development"
"Mobile game development using J2ME is not all it's chalked up to be. In theory, J2ME offers a compile once, run everywhere environment. In practice, however, the platform is very fragmented. From game developer's point of view, this platform consists of hardware, software, and back-end technology that is very often unique or proprietary to the mobile phone hardware or service provider. "