A simple device you place under your TV to recreate the viewscreen lights seen under the main screen in Star Trek. Powered by USB, which all TVs have these days. It could emit Sound Effects like the pings heard on the show.
Thinkgeek kicked the tires on this one, but I don’t think they’ll be making it.
Dave's Geeky Ideas 
I purchased a programmable led sign and mounted it under my lcd. My first attempt was using chasing lights, however that did not give me the effect i wanted.
Both of your items sound cool. Too bad you have to resort to making them, eh? Hence my Geeky Gadget Wish List.
On second thought, a manufacturer like Sony or Samsung should just include them into the set itself. Would look very sharp.
I also have a 6-8 digit clock mounted above the tv for the star trek vi look