Organisers of this year's World Congress in Melbourne say the event's exhibition is now 70% sold, with sales of booths "going fast".Today is the last day companies in our time zone can take advantage of the early bird offer, because the offer ends on 10 February in Australia (11 hours ahead).They say the exhibition represents a "premier opportunity to create genuine business opportunities, and connect you with industry buyers, partners, investors and developers.Remaining booths are detailed on the floor plan.7,000 attendees from across the world are expected at the event in October.