illegal characters in DNS names ?

Has anyone else received a spam recently offering new domain names with "illegal" characters in the domain name ? apparently under the .bz TLD, try a host lookup on http://www.b&w.bz -- Steve Systems Admin, ICONZ - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog