If the guys over at the Open Source Development labs are successful with their Mobile Linux Initiative, we could see far more handset with Linux running on them. This would add to the mix of Symbian, BREW, and J2ME development platforms you find now. Their goal seems to be a wide range of handsets, much more like Symbian than the others. That is, BREW and J2ME aren't usually found as a smartphone's only platform and likewise Palm OS (what's that?) and Windows Mobile aren't usually found in non-smartphone platforms (in fact, their OSs are synonymous with smartphones).
The OSDL Mobile Linux Initiative (MLI) has as its mission to accelerate adoption of Linux on next-generation mobile handsets and other converged voice/data portable devices. Like other initiatives underway at OSDL (e.g., Carrier Grade Linux), MLI will work to identify and fill gaps in the Linux platform and in the ecosystem above and around it.
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