The thread seemed to morph into a shod v. unshod debate and like all other topics here, there was no shortage of opinions.
What? An opinionated barefoot runner? On Gunks.com? No way...
I've run trails in road shoes and trail shoes, from very early leather clunkers through cross-country flats (they lasted me all of three races before they disintegrated, I think) to fancy gore-tex stuff. It's very subjective what works and what doesn't, and it also depends a lot on what kinds of trails you'll be running.
FWIW I probably wouldn't go with gore-tex again (if you step in anything deep enough to go over the top of the shoes you'll get wet feet anyway). They are, however, warmer than regular shoes, which makes them nice for winter running (and they do keep your feet a lot drier in snow).
The more aggressive tread patterns found on a lot of trail shoes are fine in mud but I've found that some can be more hazardous on wet rocky trails. One thing I've found helps is some kind of stiffening plate in the soles - trails with sharp rocks or pebbles tend to chew my feet up, and it's nice to have that extra layer of protection.
I'm sure there's more and if I can think of anything else I'll add it.