Hi from Michigan! I've always enjoyed playing with fractals for interesting image and even had a favorite screensaver Mandelzot for After Dark way back in mid to late 90's. It took my old computer (was top of the line back then) about 10 minutes to render a 640*480 image.
I just recently discovered Mandelbulber and am poking into it. Using the few preset parameters that came with the program I downloaded, I found lots of wonderful image. Most images are done in just a few minutes thanks to having a dual Xeon system, giving me the power comparable to a 24 core CPU or a single CPU running almost 72GHz It did give me an idea to pop out a few very high resolution (75 megapixel sized in camera talk) for poster prints.
A 10,000x7500 image of impossible world parameter with reflection, ray tracing, shadow, all the works is roughly 10 hours total to complete. Just imagine trying the same thing on a cheap Walmart model with slow and only 2 cores A few days at best maybe! Assuming it has enough memory to do it that size.
I thought I'd sign up so I can see what other parameters I could *ahem* steal for personal pleasure.

Maybe offer my computer for very high resolution rendering?