If you are a news, twitter or trend junkie, then Twendr is for for you!
Located at http://Twendr.com it shows you at a glance what’s happening across geography’s (or time, for a single place), using trending topics on Twitter.
What are “trending topics†you ask? From Twitter :
From news stories to the latest buzz about movies or music, the trending topics reflect what new or newsworthy topics are occupying the most people’s attention on Twitter at any one time..
See Twitter’s document About Trending Topics for more.
Twitter reports (as of Dec 2010) on the “World”, 20 Counties and 21 Cities , but only shows you one place at a time. 🙁
Twendr will show you what’s happening in the World and across various Countries, or a Country and the Cities in that Country. For a particular place, you can also see how trending topics have changed or gotten more popular, by looking at that locations “Last Hour”.
I do some jquery to highlight where else a trending topic phrase is trending, or when, and opening the links lets you search for that phrase on Twitter.
Now 20 Countries is a lot of Countries – even if you have a big monitor! – but you can hide Counties your not focused on by using the “Visibility” light bulb button to hide or show locations. 
As well, you can Drag and Sort the order that locations are show in. The “Visibility” light bulb button will also let you “restore” the default order.
Twitter tries to refresh it’s trending topics every 5 minutes and I’m pouncing on it as soon as I can.
Twendr is a project of Connected Thinking – me – and is built on JQuery & Ruby on Rails. Of Coruse there is a Twiiter account for Twendr @Twendr for quick updates and related information, as well a a blog for more detailed posts and help at https://twendr.wordpress.com/.
Try it; tell your friends; let me know what you think; and Enjoy watching the trends flow. 🙂
This article also appears on the Twendr Blog
Update: Dutch site Twitter Mania blogs about Twendr : Twendr: alle trends in 1 oogopslag, as does French site Twitter Radar with Suivre les trendings topics géolocalisés sur TwendR.