VPSLink IS HORRIBLE. This site was down for 40 straight hours due to their incompetence. NEVER USE VPSLINK.
You can get this data as JSON. Just add .json to the url:
/lasthour.json
/lastday.json
/lastweek.json
If you like this, check out Spaz, an open-source microblogging client written in JavaScript.
These stats are taken from the Twitter streaming API's sample resource, a 5% random sample of publicly posted messages. This should provide accurate information about what people are using to post to Twitter.
Stats are collected by a PHP script and stored in a MySQL database. Static JSON files are dumped from the collected data on a regular basis. CodeIgniter, a PHP framework, was used to create this web app. The chart is generated by the Google Chart API, and the sortable table is courtesy of jQuery + SlickGrid. Source code is available on Github.
Contact me on Twitter: @funkatron