No second book in my contract, just an option (which I understand is pretty standard -- they reserve the right to look at my second book before anyone else). My agent, however, wants to strike while the iron is hot, and I'm game. I've submitted a few ideas and am awaiting his feedback. A great distraction while we wait for the next round of edits.
Oh, the waiting! A writer's bane.
Same here. I'm working on my new WIP now.