Here are two blogs created and maintained by two acknowledged world aquascaping masters:
Ushi-Kouge Aquascaping by italian aquascaper Pasquale Buonpane that last year won an AGA honorable mention, a second place at AAC and a wonderful 22° place at IAPC.
The blog contains few articles but still very thorough. Very beautiful pictures.
FAAO Aquascaping blog is by portoguese Felipe Alves de Oliveira another true master...
just to mention some of his work: Aquarium of the month of April 2007 on APC, Best in show AGA 2006, a 10th at IAPC 2007. not to mention his famous Pinheiro Manso which laid the foundations for a new way of aquascaping .
The blog contains some great pictures (go to the tag macrofotografia) and good descriptions of its tanks.