Finally finished:
Quicksilver - Neal Stephenson
A very interesting piece of historical fiction dealing with the events around the time of the Age of Reason and the emergence of scientific thought. One thing the book really does a good job of highlighting is how interesting everything was in Europe at that time - politically, socially, and scientifically. In fact, so many interesting things were happening, that the background of the story would make a great read even without all the main plot events.
The plot itself is pretty meandering, which might help explain why the book is so damn long. The beginning is slow and pretty hard to get through. However, as with other Stephenson novels I've read, your patience is rewarded with a great climax that ties together most of the loose ends. The ones left hanging, I assume, will be picked up again in the following book of the series.
The strong points are pretty much what I've come to expect from Stephenson: (ultimately) an interesting plot, funny, and very, very intricate and clever.
The weak points are that it feels unfocused sometimes, has lots of extraneous details when you want to just get on with the story, and emotions are dealt with in kind of a matter-of-fact, offhand way. I like that aspect of his style in some cases, but in others the book really feels like it lacks warmth.
Overall I'd recommend it instantly to a Stephenson fan, somewhat less strongly to a historical fiction fan, and hesitantly to anyone else. For people new to this author, Cryptonomicon would be a better place to start.