Mad Analogy has a nice walkthrough on how to charge or backup your BlackBerry device under Ubuntu Gutsy Gibbon. This also works fine on Hardy Heron 8.04.
Barry, the software package he reccomends installing can also be installed by double-clicking on the RPM files that are available on the SourceForge.net site for the tool:
You will need to download and install the following packages:
Which some may find a little easier than the normal apt-get malarkey!
Link to Mad Analogy walkthrough: http://www.madanalogy.com/2007/10/blackberry-support-in-ubuntu-gutsy.html