United MileagePlus (Consolidated) - UA e-certs on CO

Hi,

Not sure if it was already discussed but I have this question.
Let's say I have UA e-cert issued which is valid for a year.
Does anyone know when will we be able to use e-certs issued by one on another airline (CO<->UA)?

http://www.flyertalk.com/forum/united-mileage-plus-pre-merger/1192628-e-certs-now-valid-co-operated-flights.html