If those rumors, benchmarks, and early listings weren't evidence enough, a Taiwanese member of the Coolaler forums has gotten his hands on a retail-boxed Lynnfield processor and posted photos of the unboxing. In a move sure to please those folks who find unboxing photo shoots dreary, the poster, known only as boss1228, also threw in some CPU-Z and SuperPI screenshots.
Unless these (occasionally blurry) photos have been doctored in some way, the blue Intel box identifies the enclosed processor as a Core i5-750 quad-core CPU with an LGA1156 package. That same box also includes a circular and relatively short heatsink and fan, much like those we're used to finding inside Core 2 product boxes.
The processor apparently booted happily inside an MSI M55-GD65 motherboard, and subsequent CPU-Z screenshots reveal more specs: a 2.67GHz default clock speed, 256KB of L2 cache per core, 8MB of L3 cache, and four threads (so no Hyper-Threading). Boss1228 apparently managed to push the processor to 4GHz, at which point it completed a SuperPI 1M run in 10.44 seconds. Not bad.