EXTREME Overclocking has just posted a review on the AMD Phenom II X2 550 BE & Athlon II X2 250 Processors A quote from the article:

Since AMD started releasing processors based on the 45nm process at the end of last year, we have only seen quad and triple core chips. Today AMD is launching several new processors, all 45nm and all Socket AM3. The first big processor is the Phenom II X2 550 Black Edition running at 3.1 GHz, and second is the Athlon II X2 250 running at 3.0 GHz.

>> AMD Phenom II X2 550 BE & Athlon II X2 250 Processors Reviewed