They added another 3 products in the last week. There's now a steel spinning ring (size 8-12) for $45, a sterling silver ring (also 8-12) for $145, and a "prop" ring in a little display case for $35. All of them are fairly similar to the light-up ring that we saw before.
I think I'll just stick with the light-up ring, since it's the cheapest, and I don't think I need any more versions of this ring design after that. (BTW, Noble's customer service reps told me that the ring's batteries are replaceable, which puts them ahead of Mattel and NECA in that department.)