The Official Opera Blog has announced that Opera 10.70 will feature a reimplementation of the EventSource API. I say “reimplementation” because Opera was actually the first modern browser to add support for Server Sent Events back in 2006.
The implementation was awkward and required a DOM element. Last week, Opera Core Concerns posted an update regarding the re-implementation of the formerly experimental feature, you can read about that here.
For more information about EventSource: