Isn it also available through S.u.S.E. and Red Hat?
No. Applix’s press release claims this is true, but it’s wrong. S.u.S.E. and Red Hat’s Web sites reference the prior 4.3.7 ApplixWare version, and evidently haven’t been updated. Applix has effectively decided to deal directly with Linux users starting with this version, and so is no longer distributing through other companies.