For whatever reason, someone in Microsoft Windows Phone corporate marketing for thinks that this logo (downloadable at http://www.microsoft.com/en-us/download/details.aspx?id=5014):
…is a good signal to the public that an app is available in the same way that these do:
There. Fixed that for you. (Segoe UI Light & Segoe UI versions)
kurtsh
Kurt Shintaku's Blog 