Google has never included multi-touch capability in any of the standard apps here in the US. Sounds like the Milestone (European Moto Droid) may either have Motorola enhancements or Google enhancements, not entirely sure, but I think some of the included apps will have MT capability.
Google supports it in the code, but the apps included in a Google-Experience phone have never had it. Android phones that do include extra apps or features, have been included by the manufacturer, as they are free to do that since it's an open platform. But Google Experience phones ship exactly as Google stipulates.