From EAA HOTLINE v7#14

NEW EAA AIRVENTURE ARRIVAL ATIS FREQUENCY TO BE USED
The FAA will use a new frequency for the AirVenture 2007 Arrival ATIS
this year. The frequency will have a higher-powered transmitter,
allowing pilots at a distance from Oshkosh to receive ATIS information
sooner. This is one the important changes that will appear in the 2007
EAA AirVenture NOTAM, and all pilots planning to fly in to Wittman
Regional Airport during the week are urged to obtain a copy.

Think they will tell us anymore than they have in the past?