Those loveable patent sifters have discovered that Motorola, entering into some kind of twisted competition with Samsung and NTT Docomo, will consider development of its own "smell-o-phone." Motorola says its phone would heat up a packet of scented gel, presumably one that you're guaranteed to never grow sick of. It was apparently inspired by those popular plug-in-the wall air freshener/night-lights. In this case, the heat source is the phone's own power amplifier, so it should be a quick mod, though probably not a help in extending battery life.
Note: STNKR is my own hastily crafted moniker for this would-be device, and should in no way reflect badly on the awesome creative naming power of the people who brought us RAZR, SLVR, ROKR, KRZR, RIZR and PEBL.
Motorola's Mobile Smell-O-Phone [New Scientist]