Getting an account on mono is easy and it's free.
Login to Monochrome as a guest, press [ESC][G][G], then press [C] to create your own account. All you need is a valid email address.
Send an email to firstname.lastname@example.org, with a subject of 'new account'.
Remember to mention what account name you would like. Mono account names can be 8 characters (or less) and must start with a letter.