GERMAN Chancellor Angela Merkel has overtaken US Secretary of State Condoleezza Rice as the world's most powerful woman, according to a Forbes Magazine list published today. This time last year, Germany's first female chancellor was riding high in opinion polls as leader of the then-opposition conservative Christian Union but did not even feature in the ranks of Forbes's top 100 most powerful women. And besides Chinese Vice President Wu Yi, who slid one place this year to number three, the rest of the top 10 are business executives, topped by the chief executive-designate of PepsiCo, Indian born and educated Indra...