The Energy and Commerce Committee passed its health care bill today. You can read a copy here.
The Joint Committee on Taxation wrote a helpful description of the tax provisions in the bill which was the precursor to this bill. You can find that analysis here.
Under the proposed bill, employers will either have to provide health care insurance or pay a penalty equal to 8% of the wages paid to employees (not capped). This 8% tax would be in addition to FICA taxes.
A good place to read H.R. 3200 is at Thomas.gov; link to bill here.