Need to update the Sqoop User Guide (v1.4.1-incubating) & (v1.4.2).
Section 3: Sqoop Releases states that Sqoop is compatible with Apache Hadoop 0.21 and CDHv3.

Support for Hadoop 1.0.0 was provided in v1.4.1 as per the  JIRA:https://issues.apache.org/jira/browse/SQOOP-420. Also CDHv4 ships with v1.4.1

Thanks,
Anirudh