My general opinion on the updating or re-writing of classics is why mess with a good thing, usually that opinion bears out in new works failing badly. In this case I am wrong.
Scalzi has successfully managed to modernize and re-tell H. Beam Piper's story of little fuzzy and make this classic tale more relevant to a current audiance, while staying true to the original story.
In some ways he not only succeeded in capturing all of the impact, charm and story of the original, but was able to surpass it.
"Fuzzy Nation" has earned it's spot on my shelf next to my much read copies of "Little Fuzzy", "Fuzzy Sapiens" and "Fuzzies and Other People".