Visionary Saver ... I think Twittervision, and Flickrvision are really cool. However, I thought, to be even better, why not have them as a screen saver?! So, last night I whipped up a MacOS X screen saver that shows these.
You can choose one or the other, or have it randomly choose which one to use. This is literally a quick hack.
I plan to add some other visualizations, such as Breathing Earth, and others (send me your suggestions).