Some news for the developers this morning from EMCC. They've released a VoIP engine solution that can be used in their own applications. The engine is available for S60, Windows Mobile and 'other platforms.' While VoIP is available on some handsets (and in a few cases it depends on the network you buy the handset for), EMCC's “all in one” solution is geared towards developers looking to have consistency over devices and platforms.

Garry Partington, CTO. “We were concerned that the uncertainty caused by the absence of such a solution on certain handsets may be a limiting factor for companies wishing to develop VoIP solutions. EMCC understands the need to remove such uncertainty and are happy to discuss potential options with organizations wishing to pursue such a solution.

More info is at EMCC.