Chances are that if you’ve ever seriously thought about using your BlackBerry as a modem for you laptop you’ve heard of TetherBerry, a great utility that allows you to do so without a monthly subscription from your wireless carrier.  Well, TetherBerry has changed their name.  They are now known simply as Tether, are holding a 50% off sale until Jan. 11th, and are entering a beta for an Android version of the software.

I have personally used Tether since it first came out and can honestly tell you that it is one heck of a BlackBerry application.  All you have to do is install Tether on your PC or Mac laptop, install Tether on your BlackBerry, and connect your laptop to the internet via your BlackBerry device’s wireless connection using your USB cable or Bluetooth at speeds up to 1.8 Mbps.

Tether normally costs $49.95 and is well worth it at this price, however, to commemorate,the rebranding of their name and the launch of the Tether for Android Beta, Tether for BlackBerry is only $24.95, 50% the regular price.

Purchase Tether for BlackBerry — Only $24.95, 50% off the regular $49.95 until Jan. 11th

It looks like BlackBerry App World has Tether on sale for $19.99.  I am checking with Tether to see if this is an App World exclusive, or, if we could get a 20% discount code or something, but, for now, if you are interested in Tether, check out BlackBerry App World.