A few blogs I’ve been reading lately.January 31st, 2012 by Reinder
Pushing Ahead of the Dame discusses every single David Bowie has appeared on from the 1960s to today, at great length, with historical context and insight into the creative process and personnell. That and good comment threads make it an example of what reviews can be, and what they need to be at a time when the art itself is (usually) instantly accessible at no cost or effort.
TARDIS Eruditorum: A Psychochronography in Blue does the same for every Doctor Who episode in existence and is, if anything, even more thorough, with the occasional piece that is nothing but historical/cultural context.
Bicycles are not instantly accessible so it's still possible to review and discuss them the old-fashioned way, and they don't really lend themselves to reviewing in historical sequence (though if anyone would give that a try, I'd read it), but Lovely Bicycle contextualises them anyway, and shows you how beautiful they can be.
No go forth and read!