Obama has consistently stated that the $1,900 fine for violating his "mandate" by not having health insurance is in no way a tax. However in  recent posts on Politico's site here and here not only have they comfirmed that the $1,900 will be enforced by the IRS but,

...for failing to pay the up to $1,900 fee for not buying health insurance. Violators could be charged with a misdemeanor and could face up to a year in jail or a $25,000 penalty...

Great, just what the American people want, the IRS to have more authority over their lives, becoming de facto insurence police. Gives a little more credibility to those marching in the streets a few weeks ago. Just remember Yes We Can, Hope, and Change while they are slapping the cuffs on you.