Point 2: Regardless, without meaning to be overly rude, you don't want an ecosystem or any of the other stuff you claim to want anyway. What you want is more or less to show off. Because all the other stuff you mention - social networks, contacting people, sharing experiences - you could do all that on a Palm Pixi. Indeed, people do - my wife has a Palm Pixi and uses Facebook, email, Twitter, phone, SMS, MMS and so on to keep in touch with all her friends. And the fact that only a tiny percentage of people own Palm phones, let alone Pixis, is utterly irrelevant.
Your issue seems to be not enough people have the same hardware/same platform as you so you can't talk to them about that, and can't talk to others who don't have it about it in any meaningful terms because they don't have enough awareness of what it is they don't have/don't particularly care. Consequently you're never going to be satisified with WP7 until WP7 has a much, much higher marketplace penetration and (with the biggest level of optimism in the world) that is still a good few years off. So cut your losses and switch now, because what you want is nothing to do with OS or WP7 and everything to do with being in a bigger pond.