"Focus on building a community first, and worry about monetization later." I don't entirely agree with this statement. This is precisely why a lot of startups fail because they slap on the business model as an afterthought. DHH said it pretty well: http://www.youtube.com/watch?feature=player_embedded&v=0...
Strictly referring to new media as an independent content creator, I think the statement does apply. Building the community and relationships gives you the ability to monetize much easier.
However, I do agree with you on the broader point. Building or creating something isn't an instant recipe for income. It can't be a blanket approach to something like a startup.
I'm really curious about Android as I've been an avid Apple iPhone user since iPhone first came out. Part of me wants to switch as I love what Google is doing, but I'm hesitant as I'm so entrenched in the Apple ecosystem.
I somewhat disagree with the idea. I personally like having dedicated apps performing dedicated functions. Text messages are a different type of communication than email.