My keypad had been blue for about a week now. It is harder to notice than the pearl though. You can really only tell in a dark room or at night. I would still recommend doing it since it gives a really nice look at night.

If you decide to do it, be careful and wear gloves. Just follow the disassembly steps and color the keyboard leds the same way as the Pearl led.

I would post pictures, but the only camera I have is my Pearl...

In terms of getting the Pearl apart, I found that it was easiest to get the bottom cover off by first lifting up the battery side with a small screwdriver, and then gently, but firmly, pushing downwards. It will wrap around toward the front and then pop off. Also, putting your fingernail between the sides and the Pearl and slowly moving down will pop them right off without breaking the little piece that holds them in. Once again, be sure to wear gloves because fingerprints on the inside of the screen are very ugly.