Windows 7 Tip: 
Dot TK, announced the launch of new TweaK web service, a new URL shortening service. A URL shortening service is also a life-saver in a communication channel where you are limited to a specific number of characters per session, like Twitter. In brief TweaK (http://tweak.tk/) created links of just 15 characters not 17 or 20 Characters.
TweaK also released a simple API that allows developers to integrate the TweaK service into their own application. Dot TK asks all developers that have integrated the Twitter API into their services also to integrate the TweaK API, making their offering complete.
Pretty good service, ppl dont trust tinyurl anymore, its better to use other url shortening services like this one.