>> I think many publishers (including the ones I work for) do not like
>> leaving two letters of a word before or after a break.
>
> I stand admonished. In German, it appears quite natural to split
> off two-letter pre- and suffixes, and the English hyphenation rules
> often allow it as well.
If the line length is sufficiently large, I restrict the hyphenation
to three letters before and after a hyphenation. However, if the
columns get small, having hyphenation after two characters is *always*
preferable to large whitespace gaps.
Werner