These are the sites i visit fairly regularly:

Agenda BMX
wearehomegrown.com
prettyshady.com
blewbmx.com
scruffian.com
cheltbmx.com
quis.cc
digitalbmx.com
derelictbmx.com
wdphotos.com
blackbmx.co.uk
CocaineCanada
Defgrip
TheComeUp