Thank you--I'm working on some kind of synthesis of this idea into words that fit the current situation that I can either call or e-mail them, but that makes a lot of sense and while it's scary (my main concern is that they'd say "well, if you'd be willing to dump us if you got this other offer first then we don't want to even talk to you at all anyway" and cancel the interview regardless of whether I get the OTT or not... any thoughts on the probability of them actually doing something like that, or am I probably being overly anxious about that point?) it does seem to be the way to go (tell Very Shiny what's up, and see whether they can reschedule, and if I get the offer let them know that I need a day or two to consider it and that I'll get back to them on X day and let them know my decision)