It looks like a lot of Nikon retailers do not have any SB-600 flashes in stock (and haven't for a couple weeks now). Some are marking it as discontinued in their systems. Does this mean a replacement for the 6 year old SB-600 is coming? More than likely! Here's a short convo with a CompUSA rep:
Please wait while we find an agent to assist you…
You have been connected to J***** J******.
J***** J******: Thank you for contacting us today, how may I assist you?
Me: Hi J*****, I’m looking at the Nikon SB-600 flash right now.
Me: It appears that it is “unavailable”
Me: Do you have any idea on the status of the object?
Me: Is CompUSA just out of stock, or has it been discontinued?
J***** J******: Let me check on that for you. Please give me a minute or two.
Me: Great, thanks.
J***** J******: Thank you for waiting. With regard to your inquiry unfortunately it seems the item has been discontinued. We do not have any information on the future availability of this item on the CompUSA site.
Me: Hmm, okay. Thanks so much for the information, J*****!
J***** J******: Have a great day, and thanks for providing us with the opportunity to assist you today!

via http://slickdeals.net/forums/showthr...1941332&page=2

Update: As it turns out, a shipping containing a whole lot of Nikon flashes was lost. The SB-600 is now back in stock everywhere.

Nikon has extended it's rebate program until May 1st!

• Buy the 70-200mm with a DLSR and get $400.00 instant rebate
• Buy the 24-70mm with a DSLR and get $300 instant rebate
• Buy the 18-200mm VRII with a DSLR and get $250.00 instant rebate
• Buy the 24-120mm with a DSLR and get $200.00 instant rebate

These rebates are available through Amazon.com and other Nikon retailers.