Last time I tried Veertu it was crazy buggy. I emailed them a bunch of bug reports which, to their credit, they did acknowledge. It will be interesting to see if they're fixed.

Edit: No, they're not. The Ubuntu image, on my iMac, just flickers its window horribly and is unusable.

Edit 2: There are some improvements. The Debian image now boots! It boots into the installer, which is interesting. Doing a full GUI install right now.

Edit 3: The same flickering problem affects Debian after a GUI install. Shame.

This is a video I made earlier, demonstrating the problem: https://dl.dropboxusercontent.com/u/4419997/Flicker.mp4