It’s not out quite yet, and there’s no official word on exactly it will be pumped through the iTunes download chute, but just to remind everyone: iOS 4 will be available today as a free download to all eligible third-gen iDevices (the iPhone 3Gs and third-gen iPod Touch), as well as as a limited update without multitasking for the iPhone 3G and iPod Touch 2G.
As a further reminder, if you’ve jailbroken your iPhone or iPod Touch, you’re going to want to hold off installing the update until the Dev Team tells you it is okay, although take heart: they anticipate the relase of a fully working jailbreak for iOS 4 this month.