An interesting article in the Economist (Sep 27, 2008) put the finger on why folks are keen on Android, calling it the un-iPhone , ala the anti-iPhone. It promises to be everything that Apple's iPhone is not. It's open, not closed. It's run on multiple vendors' hardware, not one. It runs on mutliple networks, not one. It's not Windows, and neither is iPhone.
Ok, so the un-ness comparison falls pretty flat, but the article did a fair job of comparing the two platforms.
Here is a FierceDeveloper slideshow of several Android applications featured in Google's recent developer sweepstakes.