Kewl stuff. Sooner or later Inkscape.org will run a competition to design the splash screen for 0.47. You should definitely hold onto this work as a possible entry.
Thanks! I'm glad you guys like it! It's a technically very easy piece, I just got my wacom tablet out and started scribbling because I was frustrated at some web development I was doing!
That is gorgeous - you should put that forward for v0.47's splash screen. Just neaten up the left and right-most spirals (centre on each side) and you're done. Love it.
:: Signature? But this doesn't look like my handwriting... ::