This probably lays outside the scope of Ground Services X but it doesn't hurt to ask!
I am sure you are aware of the wonderful product FS2Crew that is available for a number of aircraft. You interact with a virtual FO and groundcrew using voice (there is also a version using keypresses).
It's very immersive and one of the feautures I probably appreciate the most, is the interaction with groundcrew during pushback. You know, "cockpit to ground" "Ground, go ahead" "we are cleared for pushback and engine start" etc, all done using speech recognition and so talking to a microphone. I really, really feel like I'm sitting there in a plane talking to ground and it adds so much ambience!
Obviously I would absolute love to be able to interact with the groundcrew in Ground Services X in the same way using voice. I realize it might be asking too much but then again I have no idea how much programming it would take considering that voice recognition is already there in Windows 7 at least.
One might argue that it's a product that Bryan at FS2Crew rather should do, but perhaps there are more possibilities if you would do it, like being able to open doors with voice command or saying "requesting follow me car to gate XX".
I know I would be blown away by it!
Here is this video I uploaded to Youtube back in time and at 4:00 you can hear what I am talking about: http://www.youtube.com/watch?v=JofCkvZ7pLw