The ThinkPad X220 uses Sandy Bridge processors, you can choose from five different configurations between the 2.7GHz Core i7-2620M and the 2.1GHz i3-2310M. On the storage front, the laptop supports a 2.5" SSD or HDD plus one of Intel's 310 Series mini-SATA SSDs. The mini SSD can't be used in conjunction with the laptop's optional WWAN card, but you can use the ExpressCard/54 slot to upgrade the system with wireless broadband connectivity.
USB 3.0 support is available, but unfortunately you can only get it in the configuration with the Core i7-2620M. Interestingly, the laptop also offers the old-school TrackPoint and a redesigned button-less touchpad with a 45 percent larger surface area. The ThinkPad X220 is aimed at road warriors rather than gamers, you can't get it with discrete graphics but the battery life is exceptionally well, the 9-cell battery promises up to 15 hours.
Lenovo hasn't forgotten about the other little touches that should go into a modern laptop, either. The new ThinkPad has an SD card slot, multiple USB 2.0 ports, a 720p webcam, and 802.11n Wi-Fi. The whole thing is supposed to weigh less than three pounds.
Source: The Tech Report