Following the Chancellor's Autumn Statement given today 29th November 2011, all the text and supporting documents have now been published on the Treasury web site: http://www.hm-treasury.gov.uk/as2011_documents.htm
On page 66 of the Autumn Statement complete document you will find:
“A.147 Releasing reference data – The Government will establish a Data Strategy Board and a Public Data Group that will maximise the value of the data from the Met Office, Ordnance Survey, the Land Registry and Companies House. It will make available for free a range of core reference datasets from these bodies to support the development of high-value data businesses”.
The AGI will keep members informed of developments and any further information.
UPDATE: Further detail from the Cabinet Office is available HERE.