With all the different products out there, it's often hard to come up with a comprehensive list of what's available, what is popular, what works and doesn't work... I thought we could start a thread discussing the various configurations to gain a overall picture of the products available.

Device: PPC-6601 w/BT3900
Headset: HBH-300 (The range on this thing is amazing, but it's not as comfortable as the Jabra, IMO.)
Software: PocketPlus, OneCalc, OnePass (I usually manually lock the device as I've noticed the phone occasionally turns on to sync and this case tends to hit buttons), phoneAlarm, Sprint Business Connect, Microsoft Voice Command.