The info the plugin potentially goes and gets from external sites would be:

* url shortening from tinyurl or bit.ly,
* QR Code from Google Chart API
* thumbnail from Bluga.net

The plugin uses PHP 5.2> and comes packaged with: TCPDF, HTML Tidy, HTML Purifier, SimplePie, PHP Typography, OPML Parser and PHP Hooks

Hope this helps,
Martin