2120 GMT: This is an interesting video - it claims to have been leaked by "shabiha," or at least Assad military. This video reportedly shows artillery pieces firing on the city of Zabadani, the mountain city northwest of Damascus that has essentially been bombarded for many months with hardly any interruption:
Unfortunately, without a closeup of the men, or any dialogue to analyze, it's going to be hard to verify this claim.
2045 GMT: Incredible video, reportedly taken today in Damascus - the mountain appears to be Mt. Kassioun (map), and the target East Ghouta. These could be GRAD rockets, but they could also be Type 63:
2020 GMT: On December 6th we reported that the rebels were making considerable gains near the Al-Safira military base in Aleppo (map). The problem - Al Safira could be, according to some sources, not only the largest chemical weapons depot in all of Syria, but perhaps the largest chemical weapons stockpile in the entire region.