I saw this post by Dr Alexander J Turner a few months ago, and thought it worthwhile to mention here. The author came up with a useful combination of Wget parameters to archive a Google Blogspot/Blogger blog, provided it uses the Archive widget (which displays a list of posts sorted by year, month and title). It works quite well.

The Wget command he uses is:

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wget -nc -w 1 -r --random-wait -k -l 2 -p -np -E -H --referer=http://nerds-central.blogspot.com -e robots=off --domains=nerds-central.blogspot.com,blogger.com,nerds-central.com,blogspot.com http://nerds-central.blogspot.com

His blog post contains a full explanation of the parameters he uses.