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
for US-english run
for TeXLive =>
I don't know if there is also an exception log for GB english.
The CTAN location is