It looks like the 3820 has been released today, with it popping up at a few retailers online. Hopefully ncix and newegg have it up soon! Although none of the retailers I have seen seem to have it in stock.
Intel Core i7 3820 Pictured, C2 Revision of Core i7 3930K and 3960X also Spotted BX80619I73820 - Canada : 64bit Bx80619i73820 3.6g 10mb 919912 - Product Details