It would be nice if wormholes were visible, not GUI indicated. I suggest simply using particles to create a vortex-like effect, that should do it :)

PLEASE READ PRIOR TO POSTING A SUGGESTION

edit: That goes for your landing on planets suggestion. Anyway, this has already been suggested before, should be put on that list.

That would cause a pretty major performance hit if there was combat anywhere near it. I'd look at it once and toggle it off.