Pointer jitter was one of my annoyances as well on the main wii dashboard, I saw demo units that didn't have it so I always though my wii just a bit off.
When I was first setting up my Wii for the first few times I had some pretty epileptic pointer jitter. I fixed it using the re-link trick and since then it's worked fine as long as I'm not sitting too close.
laffo @ fixing your wiimote by "Fonzie"-ing it.
