One of the latest entrants into the daily deals market, and an aggregator that seems to take that need for differentiation to heart, is Top Deals London.
A very visually appealing site on its own, aggregates deals from Groupon, Living Social, KGB Deals, Wahanda and others, and plots the deals based on a very attractive map and even makes them searchable.
The site uses icons to indicate to users what exactly they'll find on the plotted deals with a quick glance at the map. See the cutlery icon and you'll find a restaurant, find a heart icon and you'll find something to do health and wellbeing.
Not a game changer in any way, but always important to keep track of all those aggregators!