Samsung Fascinate / Mesmerize (Galaxy S)
Buy One Get Any Phone!
But considering this is the most heavily verizon branded handset they've released to date, chances are good they want it to sell really well because they'll not only get the new data, but (most likely) a HUGE kickback from Microsoft for all those Bing searches.
The phone would've sold great WITHOUT a bogo, the bogo just ensures that people come in looking for the phone in particular (because most reps would point customers instead to a d2, dx, or dinc)