Yahoo shuts down BOSS API
developer.yahoo.com
developer.yahoo.com
No wonder Yahoo is in such trouble -- lately, they've taken good products, ruin them or stop improving them, then cancel them due to everyone abandoning them (Mail, Maps). Or they just cancel good products without trying to monetize them (Pipes).
I switched my search engine to use the Bing API and never looked back. It's a shame that it is the only top-tier search API available now.