There are lots of hands free accessories for mobiles, the most popular being the bluetooth headset.
Personally I will never wear one, but if you want to make yourself look even more ridiculous than someone who wears a bluetooth headset then this might be the gadget for you.
The classic hands free headset is shaped life an old style telephone and plugs into your mobile phone.
It comes in two colours, black and pink and is available to buy online for $19 from Gadget4all.