How funny is it that when crisis struck, I immediately thought to turn to my DIS friends for advice?!
He's 4 months old and does eat from a bottle about 50% of the time, but he kept pushing it away and, well, made it abundantly clear what he really wanted! Pacifier wasn't cutting it, nor did my finger. The poor little guy eventually cried himself to sleep on my shoulder. He'd already had 7 ounces, so I think he was just tired and wanting some comfort and familiarity to fall asleep.
I never thought of the dryer, vacuum, etc.! My DS was so ridiculously easy to please and comfort, I think I missed out on a lot of parenting tricks of the trade.
Thanks again for your suggestions - I'll be caring for him again in the near future, so I'm happy to be armed with ideas!