Just fired up my L3++ that came last night.  I as many figured it would just be the L3+ overclocked, but decided to buy one for science so that I could report back.  Here is what I found:

• Hardware Version: 1.0.1.3 - This is the same as other recent L3+ machines I've gotten.  I have one L3+ from an early batch which was at 1.0.1.1
• Frequency: 450
• Chip Temps - Out of the box I'm seeing temps at 68-69.  Other recent L3+ machines I've gotten I have at 438, those are running at 56-59.
• Hash Rate - Have only been running for 30 minutes, but it's current average is 584.54, other recent machines I've gotten are at 570@438
• Fan Speed - I haven't adjusted fan's on either box.  I noticed that the new L3++ was at 3,300 and the newer L3+ is at 4,230
• Power At Wall - Sorry, I am not currently measuring this.

In summary, I think people's suspicions were correct.  I think I just paid 506 (606 - 100 coupon) for the same box I got for 262 (462 - 200 coupon) for a while back.