The Nexus S' single-core Hummingbird processor was one of the main disappointments about the second official Googlephone, so we won't argue with a replacement kernel that can squeeze extra juice out of the Samsung chip. A new xda-developers kernel promises to overclock the Nexus S to 1.2GHz. The tweaked firmware is still a work in progress, with Bluetooth left to fix, and it builds on the existing Bionix NS1 mod. Obviously overclocking your phone leaves it potentially more vulnerable to hardware damage, so try at your own risk, but it'll be interesting to see how these tweaked Nexus S units compare to dual-core devices like the Tegra 2 based LG Optimus 2X.