8. The method of claim 1 wherein automatically building the index includes: in response to the request, adding the first content item to the index in association with the first one of the plurality of grouping labels.
8. The method of claim 1 wherein automatically building the index includes: in response to the request, adding the first content item to the index in association with the first one of the plurality of grouping labels. 25. A computer-readable storage medium carrying one or more sequences of instructions which, when executed by one or more processors, causes the one or more processors to perform the method recited in claim 8 .