The new issue of DebkaNet Weekly (subscription) carries describes the threat Israeli troops are facing from a well-supplied enemy, including three types of anti-tank missiles (the Sagger AT-3A missile, the Metis-M 9K115-2 and the Kornet ATGM) which have inflicted significant losses on the Israeli tank corps. DNW adds, though, that the first tanks engaged by the enemy may have been early production models not fitted with full countermeasures (in particular the Trophy system made by General Dynamics), built at a time when Israel did not envision a significant anti-tank threat on the horizon. DNW also mentions a sophisticated Hezbollah communications system (supplied by Iran's Revolutionary Guard Corps) which was able to overcome Israeli countermeasures.
Stratfor (subscription) reports that Hezbollah was able to deceive Israel about the number of rocket launchers it destroyed by using heat-emitting decoys, which absorbed Israeli airstrikes after the real launchers had been removed. They're also reporting heavy fighting in the Eastern District in southern Lebanon.