Obama's Loan Modification Plan: 7 Things You Need to Know

6. Second liens: The Obama plan also addresses the issue of second liens—such as home equity loans or home equity lines of credit—by offering incentives to extinguish them. But key details on this component of the plan remained unclear. "Distinguishing the second lien is really important," Green says. "[But] exactly how they are going to convince the second lien holder to do this is not clear to me at all."

7. Will it work? Moody argues that while the plan may reduce foreclosures for primary residences, it could lead to a spike in defaults for another group of homeowners. Although he supports the administration's efforts to focus the initiative on primary residences, Moody notes that "it could be the case that a lot of [real estate speculators] have been just hanging on waiting to see exactly what the details are of this [plan]," Moody says. Now that it's clear the Obama plan leaves speculators out, "we could actually see a spike in foreclosures or at least mortgage defaults among this group."

Glaser, meanwhile, worries that lenders may soon be overwhelmed by inquiries from homeowners looking to participate. "Starting today, millions of borrowers are going to start to call their lenders to see whether or not they are eligible," he said. "And I'm not sure that the financial services industry has the capacity to handle these inquiries."