There are a lot of tango BLOG's out there most are rediscoveries of
existing material with a bit off rehashing.

But take a look at this one, as it has the lyrics with English
translations and the background stories to some of the most popular
tango's and milonga's.

Tango and Chaos in Buenos Aires
Rick McGarrey's collection of tango stories, histories and lyrics
http://www.tangoandchaos.org/

I have also added this to the groups links.

Regards

Kevin Wood