Are there any "thin clients" that would allow me to run a Windows XP/7 app on an iPad with sound? There are a number of remote access apps (from Citrix, etc.) that allow you to run Windows apps remotely on an iPad.

I need one that would allow me to remotely run (on an iPad) a Windows app with sound, so that I'd hear (on the iPad) the audio of the Windows app. Ideally it would also allow recording of sound on the iPad into the Windows program.
The only rdp client I know of that records through the iPad onto the host is "iRDP AV".  The only problem is it doesn't have the functionality that many other RDP apps have such as two-finger scrolling, etc.  It's only 2.99 though and definitely worth it if you just need basic desktop control and mic functionality.