Obamacare is a favorite excuse for employers that are essentially shifting more of the cost to employees (they have been doing that for years by the way). Sure, Obamacare made costs rise a bit, mostly due to mandated benefits such as 100% preventive coverage, guaranteed coverage up to age 26 for children, etc, but remember that you (or your colleagues) are getting the benefits in return. However, if you have a 40% premium increase for 2013 I can guarantee you that most of it is really not due to Obamacare.
The major provisions really don't come into play until 2014 anyway - so I would hold your complaints against Obamacare until next year!