According to a couple of Mac related websites, and from what we can see from this cover picture
hosted in MSNBC.com, iPods generation 4 will be announced tomorrow (or at least in a week or so):
quote:
According to sources, the company plans to unveil thinner, sleeker white iPods with a major announcement on Monday, July 19. While the enclosure will be the same general size as that of current iPods, it will be thinner; it will also have a new scroll wheel of different style and look.
Apple will not announce the new models through a press event, though Think Secret has learned that the announcement will be delivered through an out-of-the-ordinary publicity medium.
While we are not able to confirm the prices of the new iPods, sources say that they will be lower than those of current models.
Sources are also clarifying an apparent discrepancy with previous reports of an August revision; those reports may pertain to a separate iPod mini announcement rather than a replacement to the standard iPod line. Further details will be published as they become available.
source
http://www.thinksecret.com/news/newipods.html
Note that the leaked images are from msnbc.com, kinda reliable source, and belong to the Newsweek magazine that will probably be out tomorrow.