Carriers will have the final say as to when devices with Windows Mobile 6.5 go out to the masses, but based on some vague wording in the official WinMo blog, we’re thinking the software development kit will be available as of May 11th. “Kick off launch presentation of Windows Mobile 6.5” can be taken a number of ways, but if you take into account that the event is a conference called Tech Ed 2009, it’s likely to be something for developers rather than end-users. That’s still something to look forward to, considering how much tends to trickle down from those first looks.