Have you seen these yet? I think they’re pretty neat and definitely look a little snazzier than regular ol’ laces. The grey things screw into the existing holes of your sneakers and then you thread the new stretchy (or non-strechy if you prefer) laces in/around and suddenly your old sneakers look a whole lot cooler (and supposedly more comfy too).
Lots of color options for laces to choose from; fittings are available in off-white, gray, and black.
(thanks David for the link)