Flexi, would you be interested in looking at this? I would like to post the code online in a public repository.
Btw, I am using a GeForce GTX 460 with 1GB of RAM, which seems to give decent frame rates. This stuff is admittedly not something that is backward looking in terms of hardware, which is why it's only recently being done.
I've played with Fractron and inspected the code as well. Pretty cool, and written in C# !
But note that Fractron uses the usual forward, direct method. What's cool about Orion Lawlor's method is that it uses the inverses of the functions. However, it does have some serious drawbacks.