The WordPress upgrade to v2.3 has broken the user registration. It does not send username/password back. Please drop me an e-mail (likera on likera.com) and I’ll send you your temporary password manually.
Update 31 Oct, 23:31: The problem has been fixed by the latest upgrade. If you tried to register before the upgrade but did not receive the password by mail, please drop me a mail and I’ll set it manually.