The YouMail application is available directly through the native browser on handsets running BlackBerry OS version 4.3 and up, available for only T-Mobile, Verizon, and AT&T Wireless subscribers. One of the unique features of YouMail that appears to be borrowed from the Xbox 360 is a profile page called "My Accomplishments." On the YouMail Web interface, a list of things that can be done with the service are listed, each marked either "Completed!" with a date and time, or "Not Complete---Show me How!" It sounds silly, but seeing the pseudo-congratulatory list made the less-than-simple setup almost feel rewarding, in the "everybody gets a trophy day" sort of way.
More info: YouMail