As noted earlier in the week, the new T-Mobile Dash Smartphone is coming soon. This info is in the official Dash press release:

The T-Mobile Dash will be available exclusively to T-Mobile customers beginning Oct. 25 at T-Mobile retail stores and online at www.t-mobile.com. Prior to retail availability, customers can learn more about the T-Mobile Dash at www.t-mobileregistration.com/dash.