Content Agregators sought

[Museum-Tracker]

I'm seeking suggestions of Content Aggregators people have used - and their comments on their experiences with them.

I've an information site called Today's Creators - famous people born on this day and events of this day in history.

I'd like to make this available through a reputable Content Aggregator who handles both the marketing as well as the transaction (in other words, me be a content provider).

Thanks,
David Berghouse