You can upload them via a Mac or PC today. Over the air in the future.
Sent from my iPhone
While Jobs gives no timeframe for when we might see such a feature, it does give users looking for this capability some hope for the future. HD video uploads via 3G would obviously place a greater strain on carriers' networks and also eat further into customers' data limits. For that reason it might make sense for Apple to either roll out the feature as a Wi-Fi-only at first, and perhaps offering it via 3G further down the road with user-selectable options for varying export quality.
[via]