A new build of the Windows 7 Service Pack 1 has been leaked online by WZOR, the latest leaked build is 7601.16556.100421-1510 Service Pack 1, v.172 which was compiled on April 21st 2010. There's not much to talk about this built as it comes with minor bug fixes over the previous build.

Windows 7 SP 1 build 7601.16556.100421-1510 leak details

BUILD: 7601.16556.100421-1510; Service Pack 1, v.172
FILE: 7601.16556.100421-1510_Update_Sp_Wave0-B1SP1.0_DVD.iso
SIZE: 1,306,019,840 Byte
CRC: 9EEC87D7
MD5: ADD8D6C1C17CAAF3C4C4B7A86BBE164A
SHA1: 0DE53C0F707FF9DD81457F7290B4A6E6E66EA089

WZOR has also revealed the release schedule of Window 7 SP1 which is as follows

4/14/2010 - Beta Release
4/12/2010 - Beta Release to HTP RTM
4/14-6/11 - Beta Deployment and Feedback
5/10-5/21 - Win7 BTP
6/07/2010 - HTP RTW
5/17-6/11 - RC FTP
6/21/2010 - FORK RC

Download available via torrents.