The problem for any federal employee is that if he or she has a "life change" (marriage, divorce, relocation) he has to "change his coverage" ~ and can "change his policy".
However, the only policies federal government employees can sign up with are the private sector plans that exist in his or her area (or the state they live in). As Obamacare takes hold there will simply be fewer and fewer such plans and federal government employees will find themselves tossed into the same insurance exchange as everyone else.
Theres really no substance to something called an "exception for federal government employees" ~ it's just noise coming from Obama's bowels and means nothing.
The 65% premium support here is pretty steep for a guy with no income other than unemployment. While an employee he had 75% covered by his agency (or 90% if postal). There will be some who sign up for it ~ but most won't be able to afford it.
The point is that the federal plan has many more options than you or I will have in the new bills and the federal employees will be exempt from the new plan being considered.