From the Adobe press release (Introducing the Photoshop Photography Program | Creative Layer):

Beginning today, customers who own Photoshop CS3 or higher are eligible for a special Creative Cloud membership offer that includes all of the following for just $9.99/month:

• Photoshop CC
• Lightroom 5
• 20 GB of online storage
• Behance ProSite
• Access to Creative Cloud Learn’s training resources
• Ongoing upgrades and updates

To be clear, $9.99 is not an introductory price. It is the price for those of you who sign up by December 31, 2013. This offer will be available at the same time we introduce the new version of Lightroom 5.2 in a couple weeks.

[Kerrowdown]

Wow, bit of a no brainer IMHO.

[thornburg]

Does anyone know if this is a "Cloud" version of Lightroom?

If not, and you can keep it if you cancel, then, even with the 1 year commitment, this would still be a pretty good deal for people who are looking at buying Lightroom anyway.

[raybird]

From all the flame throwing on the DPR announcement page it looks like both PS and LR are the cloud versions. However the ProSite subscription is what sweetens the deal for me - if you would want that sort of thing anyway it's normally $100/year and it seems comparable to a SmugMug "Pro" account, which is normally $150/year. Someone correct me if I'm wrong on that last point

[thornburg]

From all the flame throwing on the DPR announcement page it looks like both PS and LR are the cloud versions. However the ProSite subscription is what sweetens the deal for me - if you would want that sort of thing anyway it's normally $100/year and it seems comparable to a SmugMug "Pro" account, which is normally $150/year. Someone correct me if I'm wrong on that last point

I just poked at it a bit, and it doesn't seem to be at all like SmugMug, as in I don't see any integration with actually *selling* photos. It appears to be just a portfolio site, and nothing more.
Someone feel free to correct me if I missed it, because I'm about to renew SmugMug, and if I could get PS/LR included in the cost, that would be fantastic.

[raybird]

I just poked at it a bit, and it doesn't seem to be at all like SmugMug, as in I don't see any integration with actually *selling* photos. It appears to be just a portfolio site, and nothing more.
Someone feel free to correct me if I missed it, because I'm about to renew SmugMug, and if I could get PS/LR included in the cost, that would be fantastic.

Ah okay, I think this explains the difference - ProSite offers the ability to mark photos for sale at a given price, but it doesn't handle the payment:
How can I mark my work as for sale on Behance?

So it's not as "pro" as I thought, though it seems at least as feature-rich as the SmugMug "Power" account ($60/yr) which I currently have.

[Lou Smorels]

In regards to what you get:
This offer includes access to Photoshop CC and Lightroom 5, plus feature updates and upgrades as they are available; 20GB of cloud storage for file sharing and collaboration; and Behance ProSite for your own fully customizable professional portfolio. That means you get all the benefits of a Creative Cloud single-app membership for Photoshop CC, but with Lightroom 5 included as well, for about half the monthly price.

This offer is available to customers who own a previous version of Photoshop or Photoshop Extended, version CS3 or later (CS3.x, CS4, CS5.x, or CS6). Requires an annual commitment with monthly billing. Valid from September 17, 2013, through December 31, 2013, in countries where Creative Cloud is purchased directly from Adobe.com.

[Lou Smorels]

Pricing:
Customers who sign up by December 31, 2013 will be able to continue their membership. This price is not a special introductory price for your first year only; it is the standard price for this level of membership. But if you cancel your membership in the future, you will not be able to re-join at this special price.