You can now configure the refresh design. You can set refresh rate to 0 and the timer won't even be created. Everything will update in real time with your mouseovers. Note that this disables things like marquees and updating texts, like health and mana.
You can control the refresh rate, but remember that it's going to look ugly if your refresh rate is slower than your marquee rate. The fastest you can go is 50ms. Default is 100 times that.
Try playing with the marquee line to get a feel. Note that you may need to reload your UI with some settings.
Btw, here's another image of what I'm talking about. I want to make it so multiple LCD tooltips can come up on a keystroke or some other event. I just wish we could do the visualizations.
I know it's possible theoretically, but I don't think WoW can handle it. Note even close. You could do small things, maybe. Small meaning 32x32.
I like to call this LCD4Linux4WoW.