Solved the problem with journal-create-entry overwriting my previous
entry. All is fine so long as you publish the previous entry first
with emacs-wiki-publish (C-c C-p). I really should report this to
the mailing list since it causes data-loss if you don't get it right.
I'm still not sure if I will end up using this (journal.el) or
emacs-wiki-blog.el
emacs-wiki-blog.eljournal.elemacs-wiki - you can have
multiple entries per day - they get named automatically - each entry
can be in multiple categories - ...
The bug: This seems to be due to the fact that journal-entries-alist is empty. This should contain a reference to all the current entry pages (e.g., "1" in my case)