You should consider joining the UltraFractal mailing list. (Warning, they generate 50 emails/day or more so maybe you should think about getting a separate msn or yahoo email account just for the list). The people there are friendly and helpful. The formula contributors often ask for beta testers, and usually alert the mailing list when they add new formulae, sending a few demo parameters, etc. I have used Bryce to display a few of my fractals, and I have seen others (jockc, for instance) who use other 3d programs. Have fun, but beware, UF is addictive...remember to eat and sleep occasionally. :)

Fractals will always amaze me!