Editor's Correction:

Well, I feel better about my linguistic intuition now! Thanks to Tim's comment on my previous post, "Dreaming of Good Literature", I found that "snuck" is indeed an acceptable past tense of sneak. However, it has not always been so. According to http://dictionary.reference.com, the word has truly "snuck" into accepted English vocabulary over the past hundred years, coming to the point of almost replacing it's predecessor, "sneaked", especially for the younger generation of writers. So...now you know...whether you wanted to or not! :)