If you have another example which demonstrates your problem please
share.

>
> 2. Why all the <br />?
>
>    With mono-spaced fonts in text/plain, line break looks
>    nice.  But I don't think those line-breaks need to be
>    preserved even after export to html.
>

Use the following to change this behavior

  (setq org-mime-preserve-breaks nil)

Perhaps this should be the default setting.  I currently have this set
to true because quoted mail (i.e. lines starting with ">") can look very
bad with line wrapping.

>
> Thanks for the good work though.

Thanks -- Eric