Most importantly - join the MK BAG group if you haven't done so yet. Let the group know about any new information you pick up on, or the results of online availability and speed checkers you use.
http://www.thedevmachine.co.uk/mkbag/patchwork.htm
http://www.samknows.com/broadband/broadband_checker
Bradwell Abbey (Fishermead)http://www.samknows.com/broadband/exchange/SMBA
Milton Keynes (Fenny Stratford)http://www.samknows.com/broadband/exchange/SMBT
Newport Pagnellhttp://www.samknows.com/broadband/exchange/SMNP
Shenley Church End (Emerson Valley)http://www.samknows.com/broadband/exchange/SMSU
Stony Stratfordhttp://www.samknows.com/broadband/exchange/SMSSF
Woburn Sandshttp://www.samknows.com/broadband/exchange/SMWS
Wolvertonhttp://www.samknows.com/broadband/exchange/SMWV
http://www.bt.com/infinityhttp://www.btplc.com/Thegroup/Industryanalysts/Industryanalystspresentations/SuperfastBroadbandprogramme.ppthttp://www.openreach.co.uk/orpg/news/productbriefings/nga/nga01710.dohttp://www.openreach.co.uk/orpg/news/productbriefings/nga/nga00510.do
21CNhttp://en.wikipedia.org/wiki/21cn
3Ghttp://en.wikipedia.org/wiki/3g
ADSLhttp://en.wikipedia.org/wiki/Adsl
Broadbandhttp://en.wikipedia.org/wiki/Broadband
CATVhttp://en.wikipedia.org/wiki/CATV
FTTC & FTTPhttp://en.wikipedia.org/wiki/Fiber_to_the_x
LTEhttp://en.wikipedia.org/wiki/3GPP_Long_Term_Evolution
WiMaxhttp://en.wikipedia.org/wiki/Wimax