The 24-megapixel Sony A7 with 28-70mm f/3.5 - 5.6 OSS lens is in stock at B&H Photo as I write this. Ditto for the Sony Zeiss 35mm f/2.8, which would for me at least be a preferred lens on the A7 and A7R.
The A7 is the 24-megapixel body, the A7R is a 36-megapixel body. The A7R should come into stock soon. See previous discussion of the Sony A7 and A7R as well as the color shading and ray angle discussion.