Technophile that I am, I love new things. However, I usually don’t change cell phone hardware casually (as opposed to gaming PC hardware). Cell phone hardware doesn’t excite me that much. Italian researchers have run a study in which volunteers tried a GSM phone and determined that the part of the motor cortex next to where the phone was held showed "excitability". Of course, this was a small test (15 volunteers) and excitement doesn’t necessarily mean harm.
What I’d really like to see is a test like this for Bluetooth headsets. I don’t typically hold a phone up to my head, since I use a PPC Phone, but I use a headset all the time.
