Before the release of the jailbreak solution comex collected data from iPhone/iPod Touch users who have jailbroken devices, data collected with the help of a program called "pmap". This data will help to perfect the jailbreak solution so that it works correctly for all iDevices.
Even if comex managed to collect the data it needed, this does not mean that the jailbreak solution will be available today or tomorrow because the processing of this data could take some time. My opinion is that the release date remains July 30 or maybe a little earlier, but anyway around Friday.
You can read more details about the new jailbreak solution here.
