First, Android is not portable at all: if you're not Android, you can't run Android app at all. You can't reuse existing libs easily. And your libs/apps are useless for others. Kinda bad compared to Qt/GTK where same apps/libs can be reused on desktop, be it Linux, Windows or Mac - who cares: works anywhere. So, those claiming about WORA: please tell me, how do I run your Android crap under, say, Windows/Ubuntu/whatever? Huh? No easy ways? Such a pity. On other hand I use dozen of Qt and some GTK apps on all mentioned + n900 and it's not that it's bad .

Second, look: there are certain problems with their platform design. It's obvious that Java speed is bad, not matter what fanboys are claiming. Then, dev's forced to use dozen of horrible tricks to run native code. Same result, but much more headache.

As the result, you can have pidgin or qutim on n900. Free. Featured. Powerful. Multiprotocol. Now good luck to find something like this for Android. Same goes for, say, mplayer. And what? You can't install your own codec to handle new audio/video format? What an open platform! It's so open that Google can't dynamically give VP8 support and have to re-issue whole new Android version to do it. On n900 it's just a matter of small package though.

And now Google tells their 3.0 is for tablets ONLY. So, you can't run tablet apps on phone at all. Ciao, interoperability.

Bottom line: Android is a cool platform. "Written once, fixing bunch of weirdest issues everywhere". The only problem is that you will rather get some kind of spyware than working player comparable to mplayer if you want to watch VARIOUS video formats.