Over at PopMatters, they have a blog section called Counterbalance in which two bloggers discuss the Canon of great music. The latest entry is No. 70 - Portishead's Dummy and one of my favorite albums - this bitch is almost 20 years old!
What the blog does is take the top 3000 albums of all time and two bloggers discuss whether a particular album is deserving of that title. Well almost all time, the albums come from a website Acclaimedmusic.net which hasn't been updated since 2010, but apparently it's a Swedish site in which someone has developed a mathematical formula to "enumerate" the greatest albums and songs - evah!
And honestly, I don't know if they'll do all 3000 - currently they're up to 70 like I said.