Still broken on TurboTax's end. We should be able to eFile before the 29th. Case in point - other people on this thread without Schedule C's are able to eFile through TT. Here is the note from the IRS comment that you linked to:
"Although the IRS will not officially begin accepting and processing tax returns until Jan. 29, people do not need to wait until then to work on their taxes if they're using software companies or tax professionals. For example, most software companies accept electronic submissions and then hold them until the IRS is ready to begin processing later this month."
