Please note that this module is subject to a Drupal security advisory (SA-CONTRIB-2010-064).
Updated release for uc_migs at http://drupal.org/project/uc_migs (if supplied a fixed version for 5.x I'll happily add that to the downloads there).
See http://drupal.org/node/828614 for details.
The original code as posted in this thread was vulnerable to Web Parameter Tampering.
