I'll definitely be at the conference regardless (it's incredibly useful), but two ideas for talks I'd personally like to see:
1) A presentation by the project managers regarding the roadmap for the coming year. What changes are coming? What areas will Alfresco be focusing on? What areas will Alfresco NOT be focusing on? This would help us make decisions about whether we should be thinking about implementing customizations to get certain features, or whether they're coming and we should just be patient. I'd hope that this presentation could be pretty detailed, but could also include sufficient time for plenty of Q&A.
2) A showcase of the best/most impressive third-party add-ons to Alfresco. What are some of the coolest/most useful third-party improvements to Alfresco? I'd love to see a session with a bunch of brief (10 minute?) demonstrations of them. This could even possibly be turned into some sort of awards program–Apple has done something similar at their developers conference.
Thanks Jeff!