You're still grappled after you Jaunt. The only reason grapples usually end upon a dimension door is that you are no longer in the same square as your enemy. However.... Telekinesis isn't in a square. It has a target. You. As long as I am targeting you from a grapple, and as long as you remain a legal target, telekinesis is on you. Down side? It can't damage you, I have to use standard actions to maintain it, so I can't damage you, and it lasts no more than 13 more rounds. I can get 1 round of attacks on you with belt of battle, but I can't augment them (Belt uses the swift action that augments need), so there's no way that attack will drop you.