I hadn't noticed at first but several UVI instruments seem to now support the lightguide - eg both the Ircam libraries, Glassworks, Extreme FX 2, and Nagoya Harp.
This is very welcome of course, but I'm wondering how they are managing it given none of these libraries have official NKS support apart from the Nagoya Harp and the Ircam Prepared piano? I'm hoping this is a sign they are moving towards official NKS support for the rest of their instruments.