I love spinach and pine nut dip (local deli) they also do a really nice capsicum pine nut dip too.
Tzaitki (sp?), salmon, caviar (absolute fav). These one's you can get from the supermarket.
Eggplant is another nice one, I don't make my own, only buy them from the Deli or markets.
I also use them as a spread on sandwhich or wrap give extra flavour.
A dip you can make yourself and is one I have had since I was a young girl is smoked mussel.
You buy those tinned smoked mussells from the supermarket, add them to philly cheese and mix.