Just some more info:

House for sale on peck - contact detail - Simon Bright, same phone number as SimonBright.org (2007)
http://www.sellproperty.net/?page=out&id=58876&print=yes

Cached copy of whois for yogum.com before he added privacy on sept. 5 2014 (second link is the current whois)
http://webcache.googleusercontent.com/search?q=cache:CyYQ3VPdii8J:www.v3whois.com/w/yogum.com+&cd=1&hl=en&ct=clnk&gl=ca&client=ubuntu-browser
http://www.v3whois.com/w/yogum.com

So it looks like his actual phone and address, by cross referencing are:
Simon Bright
39A Prairie Street
London, London SW8 3PL
United Kingdom
+44 7941159485

Anyone live close by to go knocking on his door?

*Edit* Looks like maybe he recently sold or bought that flat (top listing), http://www.rightmove.co.uk/house-prices/SW8-3PL.html
31 Prairie Street, London, Greater London SW8 3PL £489,999   Flat, Leasehold   17 Dec 2013

but.... http://www.nethouseprices.com/index.php?con=sold_prices_street_detail_print3&locality=SOUTH%20LAMBETH&town=LONDON&street=PRAIRIE%20STREET&year=All&house_style=All&house_age=All&house_type=All&search_radius=15&northingToSearch=17610&eastingToSearch=52830&cCode=EW&outcode=SW8&incode=3PL&order=&start_limit=&curPage=&price_min=&price_max=

purchased in april in 2010 as well which would support the 2011  created date on yogum.com