I'm slightly allergic to trailing slashes on URIs unless they map to a genuine physical directory. Otherwise you can get problems if your mod_rewrite rules don't take into account that you can get inbound links (eg. from Yahoo Search) without the trailing slash. So I would consider the following:
or closer to root (FWIW):
to be better solutions. I admit that I am old-fashioned and I still favor a generic file extension (.htm or .html) which leaves no doubt at all - much like the URI of this thread.
I should add that the above is not really a critique of the WebmasterWorld URI structure, but rather the "blog" style of URIs which end up being a long string of words separated by hyphens - which add nothing to the site usability and are just there for SEO.
Do you think that user-generated content is usually better without keyword-rich URIs? What matters most? Brevity? Complexity? Clarity? Is there a conflict between usable URIs and SEO-friendly URIs?