Concept for a Lightweight Mars Glider [pdf] (lochief.files.wordpress.com)

Are you going to submit this to a journal or is it a university project?

I bet the core components would be reusable on other atmospheres. You could imagine spiraling down into Jupiter's red spot or the giant hexagon on Saturn.

Ever read the study of atmospheric flight on Venus? It focuses more on sustained flight than gliding to a landing, but it's still the first thing I thought of.

http://media.cleveland.com/science_impact/other/Landis%20Ven...