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If you bought a new cell phone recently, it probably came equipped with wireless Bluetooth connectivity. But does your not-so-new computer have Bluetooth yet? Probably not.

Most people upgrade their cell phones faster than their computers. The average lifespan of a cell phone is about 18 months. However, the average lifespan of a computer is around 4 years.

So what's the upgrade path? How do you add Bluetooth to an aging computer? The easiest way is to purchase a USB Bluetooth adapter.

But not all Bluetooth adapters are created equal.

Even though it will look nice with your iBook, Mac users should stay away from the Bluetake BT007Si Bluetooth USB adapter because of two major issues:

• It will not reconnect after putting your Mac to sleep
  
• They cannot be automatically updated with Apple's Bluetooth firmware
  

A better alternative is the D-Link DBT-120. It is compatible with USB 1.1, supports Windows XP, 2000, Me, 98SE, and Macintosh OS X 10.2+ and installs quickly and easily to a desktop or notebook computer with an available USB port.

The D-Link DBT-120 meets Bluetooth 1.1 specification, making it compatible with other Bluetooth enabled devices and features standard 128-bit encryption that provides you with a higher level of security for your data and communication.

Bluetooth is an industrial specification for wireless personal area networks (PANs). Bluetooth provides a way to connect and exchange information between devices like personal digital assistants (PDAs), mobile phones, laptops, PCs, printers and digital cameras via a secure, low-cost, globally available short range radio frequency. (Source: http://en.wikipedia.org/wiki/Bluetooth)