The 2.0 version was released yesterday. It depends on MobileSubstrate feature that Saurik implemented to preserve important files on your iPhones.
I had problems using it on mine, since i have all essential updates from Cydia but the MobileSubstrate wasnīt being loaded on my device,even after these updates. So i had to manually insert the MobileSubstrate loading line on my SB plist. And it worked as expected.
Please, refer to the new 2.0 topic for iBlacklist to check how to workaround this, until we correct our installation package to not depend on MobileSubstrate anymore.