The water quality guy from the water company called today, so I didn't have to go all Erin Brokovich on them, and he is coming out Friday to take a water sample.
Apparently a new filtration system just went online 2 months ago, which is filtering out some of the rust in our water. It had considerable rust before... Some customers have apparently reported a change in the flavor of the water since - not necessarily to soapy, but they've noticed a difference. Perhaps what I'm detecting isn't soapiness, but an absence of rust.
My favorite suggestion so far is to swear a lot to counteract the fact that God must be washing my mouth out with soap. Also, changing to a phosphate-free dishwasher soap (our current soap does, in fact, contain phosphates - what are phosphates, anyway?).
Big outing tomorrow, so I may not post until Thursday. I'll try to do a few mobile pictures if I can.