Skipper, I hope the momentum continues, because it looks like you're doing a great job.
I'm very interested in what you're doing. I haven't jumped in yet because, like a few others, I don't have MS search running. But I do intend to install it and limit it to just indexing images, just so I can try this.
One problem with MS Search, at least in years past, is that it didn't want to index network drives. I keep most of my archive on a shared drive so wife can see them too. So that would be a showstopper for me, unless that limitation has improved.
Also, the issue with re-encoding an image every time the metadata is changed is a showstopper.
I'd like to see more to enable workflow. In particular, I'd like to see a simple way to send a photo to any of a set of external apps of my choice. That is, one F key to send to a RAW processor, another F key to send it to an editor. Of course those apps should be editable (RAW Therapee and PaintShopPro in my case). And for bonus points, let it send a whole batch of photos to the RAW processor, if the app supports lists of some sort.
What if I changed it so that when the mouse flies over the thumbnail, I bring up a window ...
That sounds pretty cool.