The ESUG-arranged conference accommodation deadline is now over. However you can book university rooms at a range of sites via this link.
The data below is not a complete list of hotels other than the university accommodation. There aren't many hotels on the north-east side of Cambridge. The Møller Centre is very convenient, but unfortunately is fully booked for the week of the conference.
Arundel House is fairly close (20-25 minutes walk, 5 minutes bike):
http://www.arundelhousehotels.co.uk/cambridge/
There is a YourSpace apartment on Chesterton Road that is a similar distance and may be of interest:
http://www.yourspaceapartments.com
MSR Cambridge has a list of recommended hotels, but they've now moved to the other end of town, so the locations are not optimal:
http://research.microsoft.com/en-us/labs/cambridge/accommodations.aspx
Hotel Felix is very nice, but a bit out of town. It is not bad for getting to the Computer Lab (conference center) on a bike:
Doubletree by Hilton is about 25 minutes walk (5-10 minute cycle) from the Computer Lab (conference center), but very convenient for town (including the conference dinner).
The Hotel du Vin is very nice, but a little bit further away from the Computer Lab (conference center):