First impressions are pretty positive so far. The screen is quite impressive, and text in every app is noticeably sharper. Managed to try out FaceTime with someone, and as advertised it just works. Hard to say how often I will use it though, especially with the current iPhone 4 to iPhone 4 limitation.

It will take a bit to get used to the new design, similar to moving from the initial iPhone to the 3G/3GS. It's similar enough, but just different holding it that the little things like the flat back stand out.

Camera wise, it seems much improved over the 3GS. Much less noise visible in lowlight shots.

As far as the Droid X, I am only now getting up to speed on it, as I missed the announcements earlier today. I'll be curious to hear how it works out for you, especially coming from the iPhone. Overall from the quick impressions out there, it looks to be a decent Android phone, thankfully with physical buttons. Didn't really care much for the touch sensitive ones on the Evo.