Here is mine, for the Mac I'm using at the moment. This would've been funner if I was using my Power Mac G4, or even more interesting if I was using my iMac G3. But my G3 is dead. So I can't.
As you can see, it isn't blazing fast. I'd upgrade it to 4GB of RAM, but I'm too poor to do it right now. Technically the limit in this iMac is 3GB, but it will work faster on 4GB. Yeah, I'm lame for using an old iMac, but whatever. I like putting old computers to use.
(Yes, I've cleverly painted over my serial in white)
And, the revelation as to what I'm using. I know, sad. This is unfortunately a defective model. The '06 iMacs were known for defective GPUs. I found a workaround that would disable the GPU so I could use the computer without any freezing, rebooting or graphical anomalies that are associated with the GPU problems, but the downside is that I cannot watch videos, run iMovie and many animations are slow. But other than that, the machine actually operates decently fast.