Hey everyone,
I noticed in my google analytics account that a lot of people come here looking for 8x8x8 RGB LED cube kits.
My worklog on here describes the cube I am building myself, and If you’re interested in electronics at all, I recommend that give it a try yourself. There is a lot of information available online and on different blogs on how you can go about something like this. I have learned a lot since I started, and I think it’s a lot of fun.
However, If you want to buy a kit, or even if you are interested in building your own cube, you can find some interesting stuff over at the lumisense store.
They have opened pre-orders for 8x8x8 RGB Led cube kit called eightCubed v2.3. which features the same Pic32 chip vespine and me are using, and is actually really cheap at $380 right now, considering it’s a complete package with the controller, PSU, cables, LEDs, prints, display, cardreader and all the rest!!
If you changed your mind and would like to attempt to make your own however: They also take pre-orders for RGB LEDs separately and at a VERY GOOD price! Hell if I had seen this earlier I might have bought my LEDs from them 
it would have saved me $0.12ct per LED.
As I said, they just set up the shop and everything is in pre-order right now. Contact lumisense directly if you want more info.
Good luck!
Wracky.