Update: Oops… more like today.
Word is in from BGR that the next seed of the iOS 7.1 beta track will be released to developers as soon as tomorrow. It’s apparently already in the hands of Apple’s testing partners (read: carriers). The site says there will be the following changes:
The previous betas brought interface changes to calendar, the phone app, and the system shut down screen. 7.1 will also likely unlock the previously announced iOS in the Car feature.
Oddly, BGR’s report lists the iOS 7.1 beta 4 build number as 11D5127c, but that’s actually the beta 3 build number:
BGR’s track record in reporting beta releases is mixed (but usually more accurate than not), and of course Apple’s release plans can easily change, so don’t take this with 100% certainty. The previous 7.1 beta was released nearly two weeks ago.