Just bumping this topic up - no definitive news but can share thoughts on my recent communication and decision process. (Sorry for lengthy text):
As an NJ owner, line-waiter 3/31 (noonish), I received my email invite to configure Thursday afternoon. The email says to check the FAQ and directs you to reply to the email if you have further questions. Since FAQ has little on white int, I replied to the email within hours to ask if there is any new / additional timing info on white interior. As you'd imagine, Tesla is swamped with questions right now, so I did not get a reply to the email initially and ultimately reached out to the Sales phone# on the website earlier today - got a person relatively quickly and later a formal reply on the email.
At the moment, the Tesla team is awaiting updated information on questions like this, however the timing of that internal information is not known yet to the folks fielding the emails and calls. So updated info could be coming (?) in a week, a month, etc, TBD.
Since I am not set on white interior, and am not waiting for the other confirmed eventual features like AWD, I am weighing a definite 4 week delivery target on current blackish interior vs. indefinite / unknown waiting period on white interior. In all likelihood, I will pull the trigger on current version later this weekend to get my model 3 sooner. (And white will then be available for everyone else the next day, right?

Taking one for the team...

).
Side note: I did also ask about whether cream interior might ever happen. At the moment there have been no official statements to say cream interior will be offered on Model 3. Only white (eventually), current blackish, and some version of non-premium (base int) have been acknowledged.
Has anyone heard anything different officially from Tesla regarding the timing of white (or non-black) interior on Model 3? Thanks in advance.