I definitely like the "purity" of not having any references to existing currency systems. But that would be ignoring reality -- just about everyone who uses Armory, cares about the value of BTC relative to their native currency.
I wanted to add something that wasn't just a hack. When I get done some of my testing, I'll see how fast I can whip something out. Or someone else could try it for me
Just look in ArmoryQt.py for "tabDashboard" variable, and see how it is implemented. You can then add a "tabPulse" and throw it on top. Then use some of the existing examples to figure out how to layout the tab. Even if you get something ugly, it would be a lot faster for me to fix the layouts, than it would be to start from scratch.
At the very least, it'd be cool to have the a drop-down list for currencies, and then a label that is updated with the current price every 5 minutes. It could even download the latest chart from...somewhere, and display it with price. I'd like to have a newsfeed, too... but that's probably for another day!