I ask (b) because I feel bad often pushing you off because of work/family/grad school/RL prep commitments; if you wanted to be in that rotation I'd be happy to work something up. I just know (for my workflow) that it'd need to be a regular, scheduled thing if it's ever going to happen.
I'll have to think about schedule--nothing can probably start before March, so we've got some time. Do I read a vague "yeah, I'd be interested if we can make time work"?