Dates announced in Nevada, Washington, Oregon, Idaho

According to the official site, there's been more dates added:

April 24, 2010: Las Vegas, NV
Venue: MGM Grand
AMEX pre-sale: 2/20 10AM - 2/26 10PM
On Sale: 2/27 Ticketmaster.com

May 13, 2010: Seattle, WA
Venue: Key Arena
AMEX pre-sale: 2/22 10AM - 2/28 10PM
On Sale: 3/1 Ticketmaster.com

May 17, 2010: Portland, OR
Venue: Rose Garden
AMEX pre-sale: 2/22 10AM - 2/28 10PM
On Sale: 3/1 through Venue Site

May 18, 2010: Boise, ID
Venue: Idaho Center
AMEX pre-sale: TBD
On Sale: 3/1 through Venue Site