Nope. Not on mine.
The reading area of kindle is much larger than the Nokia. I've seen both devices. The Kindle is 6" diagonal. I've not seen a phone that big before.
I don't turn the page. I set it on auto-scroll, matching it to my reading speed.
That's good if it works for you. I tried on my PDA when I flirted with that method of e-reading, and I found my rate of reading isn't constant. I was either getting ahead, or the scroll was getting ahead of me.
I use dark green or yellow or light-blue on black background.
If it had been white-backlit, yes, it would've hurt me. So I use green on black.
Again, great if it works for you. Most people find that a glossy back-lit surface isn't near as easy on the eye as a matte, non-lit surface.
It's all about ease of reading to me. No back light, matte surface, larger surface, all make it easier for most people. But if you are one of the few who aren't bothered by small, glossy back lit surfaces, by all means, don't waste money on a kindle. And as you pointed out, the test drive is free, so nothing lost to see if these things are objectionable.
I've tried both (on Palm PDA, not phone) and there is no way it compares with a device made exclusively for e-reading