Any Programmable Remote would work really well with MediaShout! This would give you the ability to assign the forward button to be F9 and the back button to be F7. Then, you wouldn't even need to configure MediaShout to work with it, it will just see it as you hitting those keys on your keyboard to go forward and backward.
Any other remote with a forward and back button should work. We have used the Logitech R400 presenter in the past and it has done a very good job. https://support.mediashout.com/051566-Logitech-R400-Presenter
Lastly, we do have an iOS Remote App that would allow you to control the service from your device. I see this used mostly for a one-time event, not something that would be used weekly as a long-term solution.
I hope this helps!