AllVoices.com is an aggregator of networked and conventional news media, drawing on some 3,500 traditional sources and any number of registered users for content. It validates citizen content and uses algorithms to rank and place them for relevance and context. The merge is optimally a good pro-am blend.
It has been in beta for about a year now, but it's at last being rolled out in public form. The look and feel of the site are quite competitive. The searchable map helps pinpoint geographical content, while the categories reasonably group content (we should all have a section called Conflict and Tragedy). When I went looking for Canadian news this morning, it provided a relative impressive assortment of traditional material --- at this point it seems to have only a smattering of user-generated content.
There are many other crowd-sourcing sites in the mix, but AllVoices is on the surface a worthwhile addition.