All Apple iDevices custom firmware collection here

This is just a taste more firmware here

iPhone 4 Custom iOS 4.1 Firmware IPSW

Activated (for UnOfficial Carrier Users)

• iPhone3_1_4_1_8B117_Custom_Restore.ipsw.001
• iPhone3_1_4_1_8B117_Custom_Restore.ipsw.002
• iPhone3_1_4_1_8B117_Custom_Restore.ipsw.003

NOT Activated (for Official Carrier Users)

• iPhone3_1_4_1_8B117_Custom_Restore_N_A.ipsw.001
• iPhone3_1_4_1_8B117_Custom_Restore_N_A.ipsw.002
• iPhone3_1_4_1_8B117_Custom_Restore_N_A.ipsw.003

iPhone 3GS Custom iOS 4.1 Firmware IPSW

Activated (for UnOfficial Carrier Users)

• iPhone2_1_4.1_8B117_Custom_Restore.ipsw.001
• iPhone2_1_4.1_8B117_Custom_Restore.ipsw.002

NOT Activated (for Official Carrier Users)

• iPhone2_1_4.1_8B117_Custom_Restore_N_A.ipsw.001
• iPhone2_1_4.1_8B117_Custom_Restore_N_A.ipsw.002

iPhone 3G Custom iOS 4.1 Firmware IPSW

Activated (for UnOfficial Carrier Users)

• iPhone1_2_4.1_8B117_Custom_Restore.ipsw.001
• iPhone1_2_4.1_8B117_Custom_Restore.ipsw.002

NOT Activated (for Official Carrier Users)

• iPhone1_2_4.1_8B117_Custom_Restore_N_A.ipsw.001
• iPhone1_2_4.1_8B117_Custom_Restore_N_A.ipsw.002

iPod Touch 4G Custom iOS 4.1 IPSW

• iPod4_1_4.1_8B117_Custom_Restore.ipsw.001
• iPod4_1_4.1_8B117_Custom_Restore.ipsw.002
• iPod4_1_4.1_8B117_Custom_Restore.ipsw.003

iPod Touch 3G Custom iOS 4.1 IPSW

• iPod3_1_4.1_8B117_Custom_Restore.ipsw.001
• iPod3_1_4.1_8B117_Custom_Restore.ipsw.002

iPhone 3G Custom FW with baseband 6.15
File name: iPhone1,2_4.2.1_8C148_Custom_Restore.ipsw File size: 330.98 MB

iPhone 3GS 4.2.1 with 6.15 BB Custom IPSW
http://www.megaupload.com/?d=6JVZF92E