You might just as well, unless you have a specific problem necessitating reinstallation. After all, you only have to wait until the 29th, which is Wednesday. Depending on your locale, you might have to wait until Thursday, but in any case it's less than a week. Can't wait myself.
The most likely place will be where you see the Developer Preview posted presently seeing the changeover to Customer Preview. That web cast link is about the only thing found so far for anyone other then a regular MS tester.
It seems their handling the release of 8 differently this time around not finding any sign up page to participate but will likely post it as you now see the DPreview.
Creative Xtreme Gamer - 2nd case Realtek Onboard audio
Acer 19" dual monitor setup - 2nd case HP 20" lcd
1440x900 same on both builds
WD Caviar Black Edition Sata II 1tb two OS drives
WD RE "Heavy Duty Sata II 2tb two Storage/Backup
WD Blue Sata II 500gb
WD Black Edition Sata III 1tb
WD Green Power Sata II 1tb in external usb enclosure
Corsair TX750H 750w -Corsair 500w
Antec 900-2 -NXZT Vulcan Mini tower/carrying handle
120mm front pair, 120 rear 200cm top - 120mm Front intake 200mm side cover