I'm happy to share that Adobe has changed their upgrade policy for people who own earlier, individual products in the Creative Suite. If you have Photoshop CS3 or CS4, you now have until the end of 2012 to upgrade to CS6 (when it is released). You can read Jack Nack's concise clarification at this link.
If you, like me, purchased an upgrade to CS5, thinking it was a requirement to go to CS6, then you may want to contact Adobe to see if they can provide a refund.
FINALLY, some sense around this!!