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                            We gratefully acknowledge the generous support from the following organizations: 
                            Microsoft Corporation, Gordon and Betty Moore Foundation GBMF 554, W. M. Keck Foundation
                            KECK D322197, NSF NVO AST-0122449, NASA AISRP NNG05GB01G, NASA GALEX 44G1071483,
                            Hungarian National Scientific Foundation OTKA-T047244, Microsoft Research Grant
                            MSRC-2005-038, European Research Training Network MRTN-CT-2004-503929. |