The popularity of micro-blogging site Twitter, which as most of you will know, limits posts to 140 characters, is continuing to drive sites to offer short form URLs.

The latest to do so may well be Microsoft's bing search engine, which follows news from Facebook with, Google with and YouTube with

However, the bing URL shortener is currently only available to Microsoft employees. Powered by URL shortening service and currently offering links starting, it's actually longer that bing's URL, but obviously not longer than links to specific pages from bing.

"Currently in partnership with, we are using a URL shortener called, available to the internal Microsoft network at this time", a spokesperson told the Seatle PI blog.

And, it seems there are no immediate plans to roll it out to the general public - "We have nothing additional to share at this time" - but we will keep you posted.