I know that a nice list of (English) hyphenation exceptions was published in TUGboat, in quite a few installments. Is it compiled somewhere in one place?
taking a cue from egreg, the entire package,
hyphenex, is available from ctan and is also part of tex live. the package includes the processing module and the preprocessed list,
ushyphex, as well as the tugboat material.
update: suggestions for additions can be mailed to
The CTAN location is