I'd like to weigh in with my 2-cents, (but the Canadian dollar is down right now, so you'd begetting the short end of the deal...)
didn't someone make that joke in a thread last week??
...ANYWAYS. RGB LED Buttons. Not cheap, and quite time consuming. if you get that feeling that it's something you want, and you think it would add to the build then by all means jump in head first. Mind you I went the same route that Neph did and made my own custom leads and crimped every connection by hand. you can get prebuilt kits too, just really depends on what you want to accomplish and how much money you have to burn.
Seriously looks bad ass tho. It was a lot of hard work and there is that cool wow factor with having the lights show up for each of the buttons per game. could be cool to see white plungers with clear surrounds too. One bad ass idea is to use CLASSX leaf switch buttons. Randy has clear CLASSX buttons now (not shown on his sit yet tho), but he's been clear to me that he doesn't sell them with miss-matched solid colour plungers because of various reasons that i totally get. So You'd need to buy 2 sets of buttons... Or buy half clear and half white and P1 gets the clear ring and P2 gets the clear plunger. that could be cool! Especially with White, GGG leaf switch buttons.... hmmmm.
I don't know, Now that i've done it I don't think i'll do it on any future builds. It's kinda the feature on FLYNN's and so bloody time consuming.
All i know if it wasn't for Neph's build i wouldn't have done it, (even though others did it too his execution and attention to detail was inspirational). Mind you his help and guidance though my process did help balance the massive hit to the wallet he caused me with said inspiration.