60k is the sever service interval, the "regular service" interval is 120k miles. The fluid costs in excess of $20 a quart and it will take 8-9 quarts.
From looking at the service manual the actual process is just like any other automatic. Drop the pan, change the filter, install new pan gasket and refill. It is the refilling that is the rub- there is not a dipstick for the transmission- instead a special tool (essentially a graduated wire cable with a handle) is used, the temperature of the fluid is measured and then a table in the service manual is consulted that tells at what mark on the tool the fluid should be at.
Me, I plan to have a dealership take care of this service when the time comes.