The first one is hard to answer. I absolutely adore it, but there are many flaws that add up (Instagram, the facebook app, screenshots, semi-awesome camera, build quality, battery life...). I'd say it's comparable to the Dreamcast, I love it and won't ever sell it, but as soon as I can afford the 920, I'll switch in a heartbeat.
As for what I want from my next phone, I'd say an improved next iteration of the 800 is all I'm waiting for, and it seems that the 920 is just that (apart from the cyan). I'm not sure there's much the iPhone or Google can offer to convince me otherwise.