I had a random wave of inspiration;
When you're near the edge, why not show the edge of the screen, both where you are, and where you would wrap to, glow your ship's color?
It's a color we've already gotten used to associating with our ship. And it makes where you're going fairly intuitive.
I dunno if the Dev's have already thought of this, but I thought I'd spread the word.
Sorry if someone else came up with it first.