What does the T400s not have? A comprehensive battery. An ancient 56K modem. Firewire and HDMI. That's regarding it. At only 0.83 inches thin, the T400s is encumbered to the hilt with aspects and even has a wide variety of docking options to extend those characteristics further, at your desk anyway. Below is a list of the tech characteristics on the T400s and I'll discuss some of the more exclusive ones after.

* Combo mic/headphone jack
* ExpressCard34 or 5-in-1 card reader
* 2MP webcam

* Standard USB 2.0 port, selectively powered USB 2.0 port for device charging, * eSATA/USB combo
* VGA & DisplayPort output
* Multitouch touchpad
* Hot swappable Ultrabay: optical drive (Blu-ray available), 2nd HDD adapter, or 2nd battery.
* Fingerprint reader with LED indicator.

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As you can see above, the T400s is well laden. The eSATA combo port is new to the ThinkPad line and welcome indeed. Another innovation is the motorized USB port. Within Lenovo's power management software, you can set the port to be powered up even when the system is in reserve, hibernate, or powered off.