http://outer-empires.com/This is a brand new, space-based MMORPG. It only came out of beta at 12:00 today (BST). It currently has a browser interface which is extremely slick. An iPhone game client has been submitted to Apple for their approval. I've been playing today, and it feels like a cross between a simplified version of Eve Online and Escape Velocity. So far, I love it.
And no, it doesn't work on an Amiga