Citrix has announced the availability of their iPhone-iPodTouch app called Citrix Receiver. The app allows you to run Windows applications as services over Citrix networks. It gives the user VNC style control with greatly enhanced performance. Once connected to a Citrix XenApp environment, iPhone or iPod-Touch securely works with apps from Oracle, SAP, McKesson, Cerner, and others. Screen taps, gestures, keyboard input, and screen updates are the only Information sent over wired or wireless connections, Keeping your data completely secure.
As a bonus, for those who have been waiting for Flash and/or Silverlight content, Recevier uses Citrix HDX to deliver high-definition content to your device. It's not native support, but it's enough to get work done in an enterprise environment running Citrix. The app is available for free in the App Store.