More insights? I guess so (grin). I was talking regularly with Thom over about 18 months since committing to the Gavia. So I have heard a fair amount about the work he's done on selecting the Serac motor and the base design.
The bearing and drive architecture are the same as used on the other Galibiers. I think he's still working through a few alternatives for the finish to the base. My guess is he could ship Seracs fairly soon, however I think he wants to be totally happy with a finalized design before he starts shipping tables.
The best way to get up to speed with the Serac is to get in touch with Thom. He's a really approachable guy and, who knows, the more people hassling him about the Serac might just hasten its progress!
Note that everyone who has a Galibier is absolutely delighted with their purchase and hasn't posted a word of criticism. That's not coincidence - it's because of Thom's high standards, honesty and hard work. And you don't see used Galibiers up for sale either.