Yesterday begun what today is a fully featured free software GNOME application.
UPS monitor lets you connect to your UPSs and view their status. It is extremely easy to use, usable, elegant, and practical.
It's written in Python using the GTK 2 and Glade toolsets, and it's only 630 lines of code (for 14 hours straight, that ain't bad).
I'll be posting the application to a software forum like Freshmeat soon.