We'd heardOctober. We heardEurope in October. We heardnext month. Now,Neowin cites anonymous sources that Windows Phone 7 will arrive in the UK, France, Spain, Germany and Italy on precisely October 21st, and is preparing agood deal of marketing fanfare to support a fancy October 11th unveiling in New York City. We can't say whether the rumor's correct, but it's certainly picking up steam, as these particular numbers were independently reported byPocket-lint and the Spanish publicationEl Economistaearlier this month as well. Now all we need is an alleged US release date -- misery loves company, right?

Update:Microsoft expert Paul Thurrott says that while Redmond's indeed holding an October 11th shindig in NYC, it's not a Windows Phone event... but his source tells him the long-lost US launch date is actually November 8th. Imagine that!

[Thanks,Stephen]