A Twitter search brings up a post by razurianfly claiming the iOS4 update will hit iTunes in the next hour:

Text: “Expecting iOS4 to Hit Around 9:00 or 10:00AM Cupertino. (…)

When Apple dropped the iPhone price $200 last September, just two months after the iPhone’s release, some of you said you were okay with it because you willingly paid a premium to be an early adopter, while others of you were understandably frustrated because you would have delayed your iPhone purchase if you’d only known about the looming price reduction. (…)

A Research in Motion (RIM) patent application points to the possibility of a touchscreen BlackBerry in the near future. (…)

Go to http://reader.mac.com and you’ll find a photo of an iPhone with what looks like a list of feeds on the display, along with a note that says: “This Application Is Viewable Only On iPhone.”

Is Apple’s iPhone actually equipped with an RSS reader? (…)

A member of the MacRumors Forums, cindynjgirl79, scanned pages of what looks like a sales training workbook on the iPhone for AT&T’s employees. (…)