Actually I know we've talked about support LCD displays like that for two purposes: 1) status information in the media directors. Some HTPC cases, like the DVine, include LCD displays to show track number, etc. 2) Those LCD displays don't have buttons (that i saw). However, there are some companies like HAIOmni that make cheap lcd wall-mount devices that we would like to support.
Do you have any such LCD displays already running? If so, perhaps we could talk about it on the phone, and if you enable remote assistance, I can have one of our guys work on a GSD device for it, if you're willing to be the 'eyes/fingers' to test it. It may be a pretty simple thing to do.