From Information Society Technologies via the ACM's newsclipping service, a brief description of the NOMAD project.

...a key achievement for the participants has been the successful development of a middleware-based service discovery and composition platform. This platform can both discover location-specific services (based on location data gathered through GPS and cellular positioning technologies) and also construct complex 'specific-to-user' services out of sets of individual simple services.

It isn't quite situational software, but if it can be productized, this kind of technology could be an interesting addition.