Haha, the drivetrain seems to be a weakness on the DaBomb...it seems quite a good bike though- good for learning, better than other models. I'm not sure whether its worth upgrading it much though because I could just get a much better second hand bike without spending half as much money on it.
Here are the photos of the problem (Sorry about the not very good quality), I think a new freewheel is necesarry. If you look closely yu can see the tabs that stick out.
http://www.flickr.com/photos/58117374@N03/?saved=1
Cheers