CT600 HMRC October filing date

I know we are all waiting for the wonderful day that we can file accounts/CT600 for limited companies with post 31/3/11 year ends.

Looking through the forums - the dates 10th and 11th October seem to have been suggested, but looking on HMRC website I can see no reference to this.

Does anyone know when the system will accept filings and where you got this information from?

Thanks

Sid