It is official, Kodak has discontinued Kodachrome 200 as of November, 2006.
According to my contact at Kodak, they decided to make the announcement to vendors and labs only. I saw an ebay ad for KL-200 from Dwayne's and called them today. B&H is already out ( I ordered 200 rolls in the last few days ) and it is uncertain how much is actually left at Kodak.
Dwayne's does have a good supply that might last awhile if you need it.
We do have at least a couple years to get this stuff souped so have a go with it. I hope I have enough time to shoot and process what is now some 1,600 rolls of all speeds.
Sorry to break it to you, but it is the real deal..