The Log message, which holds the reason of the commit, is often drowned in the middle of the mail if a long list of files were committed, thus it might be worth to move it up a bit so it's in a fixed position and can be easily spotted while reading any commit mail.
This could be done by moving lines 447-449 from /usr/share/subversion/hook-scripts/commit-email.pl a few lines up (428 seems like a good pick to me).
Maybe we could also add something like:
for( @log ) {
s#(\bItem\d+)#http://nextwiki.org/Tasks/$1#g
}
Just an idea... to have directly the link to the Item corresponding to the commit.
working on it