Apple has sent an email to developers notifying them that their iCloud libraries housing iTunes Match data will be wiped on Monday, September 26th at 9AM PDT. The reason for the wipe is to “improve the overall quality and reliability” of the service. The news comes after Apple wiped all the iCloud backup data on Thursday, September 22nd.
iCloud and iTunes Match services have been running in developer beta for the last couple of months. The public release is scheduled for “Fall”, and it seems likely Apple will announce the ship date at their rumored October 4th media event.