Nobel laureate Muhammad Yunus' ouster from Grameen Bank has not diminished his enthusiasm for business schemes to help Bangladesh's poor. He still chairs the board of many Grameen companies, providing cell phone service, drinking water, yogurt for malnourished children and solar power for rural homes. Yunus has been in Washington for a development conference this week to promote his concept of "social businesses" that aim to find commercially viable ways of tackling poverty. On Thursday, he met Secretary of State Hillary Rodham Clinton. He was ousted from the pioneering Grameen Bank in May after a dispute with Bangladesh's government. He told AP Friday that difficult relations can slow business operations but he will stay in Bangladesh.