Over the last few months and years, the relaunched website of the New Beverly Theater has gained an ever increasing number of movie reviews written by Quentin Tarantino himself. It has evolved into a column of its own on their blog (they reposted older articles there and thus carry a December timestamp).
Here are direct links to some particular recent publications:
Big Wednesday http://thenewbev.com/tarantinos-reviews/big-wednesday/
A Man Called Tiger http://thenewbev.com/tarantinos-reviews/a-man-called-tiger/