There have been numerous banking apps released for Windows Phone the past few weeks, but we've still not seen apps from other big names. ING Direct is one of said names that sports an app for iPhone, Blackberry and Android, but nothing for Windows Phone. Although there's nothing available, ING Direct does feature the Lumia 900 on the mobile website.
While it's nothing huge, it's good to see some exposure for Windows Phone, and let's face it: Windows Phone has the most attractive / unique UI to show off.
Source: ING Direct; thanks ghoti00000 for the heads up!