Thanks for the post @movieperminute Really enjoyed the book when it was published. The Tim Curry mini-series was also good. Though, as a lot of people find it's not as good as the original reading.
I am looking forward to seeing it.
Incidentally, you mention Easter Eggs. Stephen King himself used to write Easter Eggs into his books.
A reference to clowns glimpsed in the drains appears in "the Tommyknockers"..