An alternate to repeal is to have the states together in an interstate compact & work together to get congress to approve it.
This interstate compact will allow the states to overturn part of obamacare ,see here: http://pajamasmedia.com/richardfernandez/2010/09/30/after-2011/
“But what an IC provides is a vehicle for working out those details by the states, outside of Congress, but ultimately approved by Congress and therefore constitutionally binding.”
Also discussed on this thread: http://www.freerepublic.com/focus/f-news/2599798/posts