The first solid Nexus S leak came back in late October, when the device was still believed to be the Nexus Two. It was rumored to have a 1.2 GHz processor and may have hit the FCC at the end of last month.
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The Nexus S may be the first native Android 2.3 device. Although it was delayed due to hardware issues, the Nexus Two recently surfaced as the Nexus S on a Best Buy flier. Engadget got their hands on a real picture of the device shortly thereafter.
T-Mobile is the likely carrier, based both on early rumors and that FCC filing. This is Samsung though, and they may launch a version of the S for each carrier.
There haven't been any solid hardware leaks yet, but that display could be 4.5" flexible AMOLED. Samsung recently unveiled the technology. While a hardware delay for a phone that was basically a clone of the Gal S seems unlikely, a weird new screen would be a perfectly reasonable cause for such issues.
The picture above comes from this leaked gallery of photos. Judging by the size of that handset, a 4.5" display does not seem at all out of the realm of possibility.
In terms of processing power, we'll probably see a 1.2 GHz single-core (as rumored earlier) but Samsung may very well surprise us. November 8 is definitely not this thing's launch date, but the flurry of rumors could point to a pre-Holiday 2010 launch. Android Community has just posted some internal documents that may reveal the coming of Nexus S displays to Best Buy locations on November 14.