iOS 5.1 was released today. It has a build number of 9B176. Here are the direct download links:

• iPhone 3GS iPhone2,1_5.1_9B176_Restore.ipsw
• iPhone 4 GSM iPhone3,1_5.1_9B176_Restore.ipsw
• iPhone 4 CDMA iPhone3,3_5.1_9B176_Restore.ipsw
• iPhone 4S (9B179) iPhone4,1_5.1_9B179_Restore.ipsw
• iPad iPad1,1_5.1_9B176_Restore.ipsw
• iPad 2  iPad2,1_5.1_9B176_Restore.ipsw
• iPad 2 AT&T iPad2,2_5.1_9B176_Restore.ipsw
• iPad 2 Verizon iPad2,3_5.1_9B176_Restore.ipsw
• iPod touch 3rd gen iPod3,1_5.1_9B176_Restore.ipsw
• iPod touch 4th gen iPod4,1_5.1_9B176_Restore.ipsw

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