This machine is brand new and it looks like you can't even buy it online from Lenovo yet, but it looks like a great deal compared to my super-expensive Sony Vaio Z.
For years, I've been a fan of Sony Vaio ultraportable laptops. They're small enough to carry around anywhere and pack the power of a desktop. Beause of their small size, I haven't felt the need to buy a tablet.
The latest model I bought is a Z series with a 2.8 GHz processor, i7 m640 chip, and a 256 GB solid state hard drive. It aso has eight GBs of RAM and the 64 bit version of Windows. It's about 4 pounds and gets about nine hours of battery life with the extended life battery. It's a great machine, but it cost $3200 when I bought it four months or five ago.
However, the Lenovo ThinkPad X220 recently reviewed by PC World looks like a real contender. The specifications of the model that was reviewed match up well with the bare bones Sony Z series but at a lower price.
You can upgrade the processor, RAM, and hard drive and it will get you everything a state-of-the-art Sonys Z offers but at a few hundred dollars less.