Local.ch has established a strong position in Switzerland bringing in a number of additional local content feeds (classifieds for example). They also have a very robust mechanism for refining some searches by time.
The Local.CH home page is city-oriented and exposes a range of content in each city including Yellow Pages, Classifieds, Automotive and Leisure (primarily event information).
Refinement in Local.ch is limited to different cities or different categories. The categories seem to be only tangentially related to the core user search.
The Leisure section on Local.ch centers on exposing different events, movies, theaters and museums. A 'When' refinement is added that provides a very colloquial way of expressing time-based refinement.
A search for Concerts in Bern shows a very sophisticated way of refining event results based on specific date or by more colloquial expressions, such as 'next week-end'.
While the individual automobile listing is user-generated it's provided from a 3rd Party source. Additional meta information is extracted and presented as well (color, mileage, and registration). The meta information can apparently not be used in further refinement.