Update: consolidated the template in single file
I moved the template out to external file for the HTML report in git master.
Check it out here
Template can be overridden from $HOME/.local/share/hamster-applet/
So now it is possible to customize the report if you have been using to generate invoices and such.
Default template using the hosted jQuery UI lib. Interaction elements get hidden when printing.
Apart from human readable format, durations can be represented in minutes or decimal hours, and start and end times have their ISO aliases.
So, i think, with a little bit of HTML and JavaScript, you should be able to turn this into whatever there is you need.
Simple python string.Template substitution is used. And additionally, where nesting is required, an xml-style tag has been introduced.
I did consider grabbing something more proper, like mako, but the implications of having it implemented properly did not weight against the gains.
As you can see in the screenshot, the report could use some (major) love. So if you would like to get your hands a bit dirty and make it better, your effort will be appreciated!
Project Hamster 
Toms, I love your app, I use it more and more and since my Fedora 13 reinstall, I was thinking it would be nice if I could invoice directly from it. I’ll play around with the template and I’ll give you a shout if I come across anything worth mentionning.
Merci!
Simon Lachance
Twitter: simon13
Hi, just a feedback.
Your panel ROCKS !!!
THANK YOU !!!
I love Hamster, and this new report doesn’t look half bad. However, it does need pretty bar graphs!
I love the new reports that Hamster generates; I do have one question, though. On the old report, there was a “Totals” section, which show things by catagory for the whole time period reported. Is there a way to get this on the new report? It is extremely useful for easily documenting billable hours.
i guess should add the grand totals back. file a bug if you can. otherwise i’ll just try to not forget it