The gradient technique is the same that I've used on the last few I have done- with a damp makeup sponge. I seem to get much better results that way as opposed to using a dry sponge. For the gradient colors, I used Into the Night and DS Magic. The way that I did it, I first brushed on MBSW and ITN onto the sponge then sponged that on. I sponged thoes two on twice, then switched ITN and Magic. I brushed on only a tiny bit of Magic because I wanted it to be more subtle and more on the very tips. I think the overall look came out very nice.
I think I'm finally starting to get the hang of sponge gradients lol. Now, if only my stamping would get better........ :P