MuscleNerd has announced that an upcoming version of RedSn0w will support restoring and allow for downgrade of the iPhone 4S and iPad 2/3 for those with SHSH Blobs saved.
A study by researchers at the University of California at Santa Barbara and International Security Systems Lab found that Cydia apps leak private data less often than App Store applications.
The ChinaSnow development team claims to have created a SIM interposer solution called TPSIM which can unlock the iPhone 4S on basebands 1.0.11, 1.0.13, and 1.0.14