I'm working on a Python application that runs in the system tray and displays notifications to the user in the form of popups. It uses Growl on Macs and Growl for Windows on Windows. I've tried notify-send in Ubuntu, but it won't display a new message until the last message displayed goes away. Sometimes, I need to display 2 messages in quick succession, so that's no good. What else is out there that I could use?
Rather than using the external