This evening I discovered that as of today, Oct 16, the number of frequent flyer miles needed to purchase a ticket for travel on United increased. Guess I should have booked that ticket for one of my family members yesterday!

 From United's Site:

Effective October 16, 2006, the number of miles required to redeem for many Standard and select Saver Awards will change. The domestic Economy Standard Award redemption amount will increase from 40,000 to 50,000 miles.

Rates for destinations outside the US and to Hawaii also increased.  I haven't poked around to see but I assume that the number of points required to upgrade also increased.