The wait is over for the official bits, at least if you are an MSDN or TechNet subscriber. Windows 8 is available to MSDN subscribers via this link and TechNet here. Servers were bogged down yesterday with people trying to download the bits and today should prove a better day on getting the software. If you aren't an MSDN or Technet subscriber you can 90-day evaluation version here. The code in these versions is the same that will be released to the general public on October 26th as an upgrade or with new Windows 8 PCs.