Moria has a review. 1000 Misspent Hours calls it "one of the best of its breed". Images Journal says "Bad acting is rampant" and that "in the world of schlocky, campy sci-fi, The Blob remains one of the most endearing movies". The NYTimes describes it as "woodenly presented". Classic Sci Fi Movies has a review.
5/3/2009: The Criterion Contraption has a review.
6/18/2009: The Vault of Horror has a review and says, "The Blob is a fine piece of pop horror entertainment, and deserves to be treated as the seminal sci-fi terror film that it is."