Couldn't agree more with this. I've been keeping an eye on Podio's plans for Gantt for ages, and it's been talked about and teased... but all that keeps coming back is the app from Bendixkeil on the app store, which is honourable, but far too basic to be useful - it's not true Gantt as it only shows one level of information - no linked sub lines like Deliverables or Tasks, and it's not fully supported. As Martin says, to be useful (and it would be extremely so to a large majority of Podio users from the Podio forums I've read) we need to have sub line data to see main Projects, linked Deliverables and associated Tasks.
This would give Podio a MASSIVE advantage
Come on Podio!! :)