Network Rail have finally submitted their planning application for the station; at the same time the Crown Estate, owners of Cowley Road business park, have submitted an application for access through the site to the station:
This page will aggregate all the news and updates on the new rail station proposed for Chesterton Sidings.
The station is expected to be completed by end of 2016 but currently Network Rail are not publicly committing to a opening date.
The current illustrative plan for the station can be found here: CSPsiteplanSept12.
The County Council page on the station is here: http://www.cambridgeshire.gov.uk/transport/projects/cambridge/scienceparkrail/.