I forgot to post this up previously.  I built a back lit "Listen To" sign for our display.  Pictures are here.  I will update the pictures with a shot of the sign in the yard soon as well.  I got away pretty cheap, as total cost was around $60 or so.

 I used a cedar 4x4 post and a cedar 2x4.  The sign face is a design I did in Photoshop and had printed on translucent vinyl and applied to clear lexan.  The sign back is 1/4" foam board which I hot glue and caulked the rope light to.   Also used 1/2" EMT (electrical conduit) for the stakes to support the sign in the ground.