Bebo lets users fine-tune what banners they see.
Tooting my own horn again. "If people are to endure ads on their MySpace pages, at least let them and their friends pick the ads to see." That's from an Adverlab post back last March.
And this is from a last month's AdWeek: "In 2007, Bebo [MySpace's British competitor] plans to add advertiser-supported widgets, like interactive games, which users can opt to add to their profiles. Advertiser applications will get a featured spot in the Bebo Widgets gallery. [...] One of the ways it plans to win over users is giving them more say in the site's advertising, rather than plaster it with banner placements." (via Interactive Marketing Trends).
Earlier:
How to Advertise on Social Networking Sites
