Remember that LightWedge has multiple kinds of lights.
There is this one that we all want for the Sony Reader...
http://www.lightwedge.com/prod_original.html
But I don't think this is being worked on. At least no one has said that it is being created for the Sony Reader. And we have had reports that the existing versions don't stay in place well on the Reader because of fit.
The good news is most likely all about the other light that was originally reported at MobileRead -- the clip on light that clips to the case at the top, and has a flexible neck with LED light(s) at the end of the goose neck.
I think that is a really nice light and look forward to seeing it released, but I hope people aren't getting excited with the false hope for the other kind of side light.