SHA1 checksums:

dd22ef3c075f2e06c99375b3a04d7964d6a38194 README
4a83cadd37aab864cbf21efd9e39996a73cbb210 sudo-1.7.0rc1.tar.gz
b487e9ae1b73708ad0cc7fdfc6000654fb5ddaba sudo-1.7.0rc2.tar.gz