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Here is what you're referring to: Four new Pearl themes here, from frilly to edgy - BBHub
That was posted on Posted Oct 2nd 2006 12:54PM -- nearly 3 years ago!
The article clearly states the following
BlackBerry Forums member acnst has posted screen shots of the NEW themes available for OTA download from mobile.blackberry.com. The link is below.
This is the tread they're referring to: http://www.blackberryforums.com/medi...tml#post333355
Try going to mobile.blackberry.com and see if you have any luck finding it there. I would think they have been removed since that article was posted.