I finished Quicksilver, over some days of travel and jetlag. I admit to personal bias, have loved and studied the grand, long eighteenth century for years. and emphathizing with Stephenson's evident, and decently researched, enthusiasm for the period.
Some notes, from the other end of the book: Eliza adds a (1) female character at last. Like Daniel Waterhouse, though, she remains ultimately a bit thinly developed.
Much brutality in the book, and a great deal of scatology (for an sf or historical novel).
The two major strata of the novel support a great deal of formal and referential linking, but are nicely kept from collapsing into each other.
Last post on the road, hopefully. Infocult's flying back home.
Happy Halloween, blogosphere.