I have recently bought Small World and I'm loving it. I find it hovers just on the edge of what I find an acceptable play time, but I figure that once it's learned, we can speed it up a bit.
I'm sure I'll want to get into the expansions sooner or later, but I know in some games (such as Carcasonne) each expansion makes the game take longer.
Are there any changes in any of Small World's expansions that lengthen play time?