I've got it planned, but not built....
Linking the front is a LOT harder than the rear (which is probably why you don't see it as often)
Oil pan clearance is a concern with the links
Tire interference with links (when turning) is a concern
Finding a location for a crossmember to hold the frame-side links is tough
Building the structures to hold the coilovers isn't trivial either.
It's definitely possible, but I've only seen a couple on a full-size ever. JuanBlazer has one, and Watson has the other. Willyswanter has one too now that I think about it....