WPCentral editor-in-chief Daniel Rubino, who tweeted, "Windows Phone Developer Program for 8.1 probably won't happen on the 2nd as it's been delayed." But, Rubino followed up that tweet by saying that Windows Phone 8.1 is "very close" to being released to manufacturers, but that there are still some bugs that Microsoft has to work out.The news comes from
Assuming all of this is true, it sounds like we won't see the developer preview next week, but Windows Phone 8.1 could still be on track for release on hardware this summer. Rubino did note that he hadn't heard anything about a delay in the full WP8.1 SDK release, so that may still be on the docket for Microsoft's Build conference.
It sounds like we should at least get more info from Microsoft next week, and in the meantime, you can take a look through our massive collection of everything we know about Windows Phone 8.1.