I like the P-MP systems. First, I have never cared for monopolies like the phone company and I like to have the widest diversity of choice possible.
From a disaster recovery perspective, these systems rock. Imagine a unit you can have shipped in overnight that can reestablish a T1, nail up an Ethernet link, or provide you upward of 10 times the capacity of a point-to-point T1. All without a license, or the need to go to a school, or the need to add yet another black box to interface with your network.
Check them out. You can get more info at AirCanopy.net and myriad other sources. Until next time, have a super and disaster-resilient year!