If you go to this link below - it explains a little more, briefly. It is an interview with Hugh Tant on October 22nd 2004. Old I know, but interesting nevertheless.
http://www.usip.org/library/oh/sops/iraq/sec/tant.pdf
The interview needs to be read in it's entirety but if you go to page 6 it states :-
"TANT : Now, with the new dinar, we have six denominations for the people. I understand that they're going to reestablish some coinage and perhaps two additional denominations, giving them a total of eight denominations plus coinage to continue progressing the currency situation."
No timeline.
I can see what that tells me - anyone else's thoughts?