Message on the TSTO FB page from EA:

2nd edit – Oct 13th – new message on FB and AHQ …

We’re still working to get an update out to you, but in the meantime if your account is bound to an EA Account, it is absolutely safe to try deleting the app and redownload it. Then sign back into your EA Account, and you’ll be back into your Springfield and tapping to your heart’s content. Many players are reporting this has solved their issue.

If your account is not an EA Account, or you’re unsure, please take no action at this time. The upcoming update should allow you to get back in without losing any progress.

While we know hearing “Coming Soon” is dreaded – it is coming, and the plan remains the same. Once the issue is resolved with an App Store update, we will extend the event and provide an in-game token of appreciation to our iOS users, along with the Xylem bundle fix.

We apologize for the disruption and thank you for your continued patience while we work to resolve this issue once and for all.

1st edit – Oct 13th – no news yet on when the update might be out for this

The original message from Oct 12th: See that here

We think we’ve chased out the raccoons and are just making sure they didn’t let in any ghosts before we release a new update! While we’re looking for signs of haunting, let us share our plans to address some additional concerns you’ve raised:

First, all players will receive an extension to the current event’s timeline to give everyone the chance to play through the entire event. Second, for any players affected by the Xylem bundle issue, we will be awarding the missing items that should have been granted. Lastly, iOS players will be receiving a little something in-game as a token of our appreciation for their patience during this week’s troubles.
These changes will be available shortly after we release the next update.

We understand the frustrations of not being able to play the highly anticipated Treehouse of Horrors event and continue to resolve this issue. Thank you for your devotion and love of The Simpsons™: Tapped Out.

I’ll look out for any changes to the dates or anything else and let you know when I can, and if I get any idea of what the iOS players will see when that update hits.

Looks like everyone needing Xylem will be happy though.

Right, nightcap time so I can be up to write a Rundown for Act 2 …