Just a thought, I talked to a guy a few days ago about how he was learning Kanji. In short, he uses a similar technique to how Heisig ordered his Kanji (I don't really know if this guy is/was an RTKer); Step 1 seems to be: Create a mind map with one central Kanji or radical in the center and then have branches leading to Kanji with similar parts (pretty much what Heisig has done in ordering his material). He then, in step 2, takes that material and internalizes it. Finally, he reviews it regularly.

I think he is on to something with using mind maps in this way for Kanji. It wouldn't be hard to use some basic mind mapping software to map out the Kanji connected to the radicals in RTK 1 and cut and paste this as a screen shot in to Anki for later review (although, how to judge your reps and what the question might be are two things I'm not sure how to work through at this point - perhaps a empty gap serving as a closed delete that you have to fill?)

Anyway, worth a try.

Does anyone know a nice looking tool for displaying Japanese sentence syntax information - word trees, but really easy to work with?