It appears as though Windows 7 Build 7201 has leaked across various bittorrent sites, with the following build information:
Windows 7 Build 7201 x86 (32-bit)
Build String: 6.1.7201.0.090601-1516
File Name: 7201.0.090601-1516_x86fre_client_en-us_Retail_Ultimate-GRMCULFRER_EN_DVD.iso
Size: 2,499,923,968 bytes
MD5: 70E48837DD513BA98FE483AFD0746E37
SHA1: F2BC6FC5861C76C401DF6DA7137962C727ED938D
CRC: 102CCA5A
Windows 7 Build 7201 x64 (64-bit)
Build String: 6.1.7201.0.090601-1516
File Name: 7201.0.090601-1516_x64fre_client_en-us_Retail_Ultimate-GRMCULXFRER_EN_DVD.iso
Size: 3,223,117,824 bytes
MD5: A64636ED74E50E7E882CDB5B80A8FCFA
SHA1: 92AC49897DE56F62BF0EF5C138974179EDE74C50
CRС: 0AFDFA70
This was only compiled on 1st June, so it is only 3 days old!
Windows 7 Build 7201 x86 (32-bit)
Build String: 6.1.7201.0.090601-1516
File Name: 7201.0.090601-1516_x86fre_client_en-us_Retail_Ultimate-GRMCULFRER_EN_DVD.iso
Size: 2,499,923,968 bytes
MD5: 70E48837DD513BA98FE483AFD0746E37
SHA1: F2BC6FC5861C76C401DF6DA7137962C727ED938D
CRC: 102CCA5A
Windows 7 Build 7201 x64 (64-bit)
Build String: 6.1.7201.0.090601-1516
File Name: 7201.0.090601-1516_x64fre_client_en-us_Retail_Ultimate-GRMCULXFRER_EN_DVD.iso
Size: 3,223,117,824 bytes
MD5: A64636ED74E50E7E882CDB5B80A8FCFA
SHA1: 92AC49897DE56F62BF0EF5C138974179EDE74C50
CRС: 0AFDFA70
This was only compiled on 1st June, so it is only 3 days old!