Making a retraction is usually a bit of an embarrassing situation, but in this case, I do gladly admit to being incorrect. This morning I received an email from a Mr. Chris (one of the authors of Exhibition Hall), who explained that..."Exhibition Hall isn't dead... its just sleeping"!
The team behind the Hall has been busy working on a series of projects, and therefore took a hiatus regarding the publication. However, they anticipate having the next issue of Exhibition Hall out in a late winter / early spring time frame. Thus, to reiterate Mr. Chris' statement (located in yesterday's comments) "...if anyone reading this is interested, send us art/articles!"