My 99 contour died this same way last June. It was definatly an alternator issue. The alternator is in a bad location and tends to get salt in it. My alternator was highly carroded on the contacts and eventually started to burn up do to the fact there was arching from the lack of pick up points. The car restarted after jumping and ran fine, but after running tests from the ford service manual I foudn out it was the alternator. To determine if this is truely your problem also, ask your wife if she noticed other warning lights blinking. Mine first started going with the air bag light blinking, then the abs, then collant, then the tach went and last the speedo, minute later just stalled and I was stuck on teh side of the road.

Hope this gives you some insight
-Greg


1999 Ford Contour Lx, 2.5L V6 ATX, 145,000 miles Pioneer DEH-P6400 H/U , Rockford Fosgate 351M 350 Watt Amp, Pioneer TS-W305DVC 12" Sub, Compustar 2WSS, Whelen CSP650 Strobe Pack with 6 strobes, Whelen Talon B/B LED Dash Light