Results of today's BITMAIN announcement:
1) Existing S3 owners basically received a 0.1 - 0.2 BTC increase in the value of their individual S3's
2) New ebay scams: Sudden increase in the number of S3+ units for sale.
3) cynical B1 owners now have the new S1- model.
Huh, what announcement where ?
The point of 1) was that S3+ really won't be mining in the US or Europe until about 9/25. In the mean time between receiving a early batch S3 and 9/25, you will have mined about 0.2 to say 0.4 BTC. The early batch s3's were about 0.68 BTC and the S3+ are 0.58. So either the early batch s3's were too cheap or the S3+ are too expensive.
Throw in what somebody down thread also mentioned, is that BITMAIN will also get a few weeks of S3+ mining.
B1 was obviously underpriced because it was announced around the time when the big 25% difficulty jump happened and nobody could have predicted the subsequent sub-10% difficulty increases.