I have a Garmin D2, and use Basecamp on my iPad to create and send routes to it. If instead of Basecamp, I use SkyDemon, I can email myself the route, and then open the .GPX attachment from the email in any apps that support it (in this case, Basecamp).

It works fine, but it's pretty cumbersome. It would be great if you could open the .GPX file with any supporting app directly, rather than having to email myself the route, and then open the email attachment with Basecamp. It would seem to be a simple thing to include, and would be very useful indeed.