A shortage of components has forced the delay of the product's launch. There is no longer an official date for shipping to begin but the delay is expected to be anywhere from 3 days to as long as a week.
Retailers will not be receiving their shipment of PS Jailbreak dongles on Friday as scheduled. Anyone telling you otherwise is either misinformed or disingenuous.
And, remember, you read it on PSX-SCENE first. ;)