Yahoo's BOSS search Web Service will no longer be completely free.  It's now a business.   After 10,000 queries, a tiered pricing model kicks in (AWS clearly used as a model). Rates depend on query time, number of results (new maximum of 1000), and number of queries. Users will start paying up later this year. Currently, BOSS receives over 10MIL queries a day, and included TechCrunch among its user base.