Le Journal du Net (in Frech) has a good article on the "trendy" online advertising formats in France. The traditional banner popularity is declining (-9,3 points in 2005) but this is still the most used format. The 468x60 banner is still alive because it's a complentary ad format, which works good when associated to the emerging rich media (skyscrapers in particular).
Generally speaking, intrusive ads such as pop-ups and pop-unders are disappearing from the French scene, with advertisers rather preferring ads which fit into the editorial content.
(see also Static banners aren't dead)