Semi-tethered JailBreak which was released by BigBoss days ago has been updated to work with mobile Safari. It has become possible due to the Saurik’s mobile substrate which now supports semi-tethered JailBreak and people would be able to run mobile safari after the reboot. Even the reboot timing has been tremendously reduced because of the lack of daemons patching.
In addition to it, Semi-tethered now works with iOS 5 notification center plugins. With time, BigBoss is trying to improve the semi-tethered JailBreak and mobile substrate plays an important role in it. Also, BigBoss is looking forward to patch the mail to work it in the next update. Semi-tethered is of great use in need of an urgency for users who have no access to PC/Mac. Due to the first ever introduction of mobile substrate, it has entered into beta testing stage.
For AppSync and MyWifi to work after semi-tethered JailBreak, those guys need to associate their tweaks with mobile substrate as well. You may come across some bugs. If you do, report it to BigBoss through mail. It would be of great help to him.