Texas Instruments is about to make wireless capabilities much easier for manufacturers to add to their products:

This will allow TI to add a cellular radio right into its DSP processors which are used by companies like Nokia and Palm. (Well digital CMOS radios have been around for a while, but it has been very hard to make them commercially thus far.)

This digital CMOS radio would cost an additional 35 cents and will basically do three major things: cut the cost of handsets drastically, reduce the power consumption hugely, and if all goes well basically make bluetooth, Wi-Fi and all future wireless PAN and LAN technologies fairly easy to incorporate into the handsets.