Cancelled or Postponed?

OK, which is it?

I recently posted that the the FMI-Marketechnics show scheduled for Dallas the first week of May 2009 had been cancelled. I was almost immediately corrected (and subsequently posted a correction) by someone that the show was postponed.

This week I read in Trade Show Week that the show has been cancelled.

OK, can someone out there tell me if the show is postponed (coming back at a rescheduled date) or cancelled (won't come around again until next year)?

Anybody?

TTSG