1. My primary phone is a Nexus One, I switched from a first generation iPhone. I still have it but I'm not writing iPhone apps at the moment.<p>2. It's a free app so sales aren't a factor. I did get an email from somebody who liked it about 10 minutes after it popped up in the market, so there are at least some users out there.<p>3. The built-in widgets are fine for my purposes, although I only needed a few buttons and a text view. For testing I set up a bunch of virtual devices in the emulator with different screen sizes and OS versions, and I didn't have any problems. I was able to stick to Android's layout managers which do a decent job of adapting to different resolutions. (And I'll be interested to see how Apple deals with future higher-resolution devices, since most iPhone UIs use absolute pixels).<p>This is just a hobby for me so I have the luxury of focusing on what I enjoy more, which is Android by quite a bit. Of course if I had a plan for an app that I expected to make a lot of money, I'd have to go with the iPhone.