Headsets.com is giving away free Plantronics Discovery 925 Bluetooth headsets to people who are arrested for talking on a cellphone (without a headset) while driving.
The authors at OhGizmo say that "only the first 734 offenders will get the headsets and the offer is valid for US residents only."
This is a fine example of word-of-mouth marketing. A company does something stupid and the online world comps them some free advertising. You're welcome Headsets.com.
Jawbone did a similar viral campaign, but they only offered a $20 price reduction for their headsets.