You're absolutely right. Thank you for pointing that out.

Here is a link to Oracle's licensing documentation for 10g:
http://download-west.oracle.com/docs/cd/B12037_01/license.101/b13552/options.htm

It clearly states that both the Enterprise Manager interface to the SQL Advisor and the DBMS_SQLTUNE PL/SQL package are subject to licensing the Tuning Pack.

BobW