This is a very minor suggestion:
I participate in a few other online discussion boards that use a layout similar to that of Wordorigins. A few of them use the convenient device of repeating the hyperlinked breadcrumbs shown at the top of the page at the bottom. ("Forum Home > Wordorigins.org Discussion Forums...")
As I said, this is minor, but it’s mildly annoying to see that a new entry has been posted, open the topic, scroll to the bottom of the page, discover that someone has written, “I agree with what X said” (or worse, discover that it’s spam), then have to scroll up to the top again to return to the list of topics.
And, yes, I know I can use the Back arrow, and I could go on apologizing for bringing up such a trivial matter, but I’ll just say that--assuming it doesn’t require too much effort for you to set up--it would make an already pleasant experience even more so.