Thelo is the super tech guy behind www.fantasystrike.com/dev
That's our site that allows you to play Yomi and Puzzle Strike online. (We really need that site to look better. Can anyone help?) Anyway, Thelo spoke at the Unite conference about integrating a game made with the Unity engine with website features such as chat, matchmaking, accounts, leaderboards, and so on. This isn't a design talk, so consider yourself warned if you are afraid of tech talks. Get a sneak peak at what's going on behind the scenes for us tech-wise, and why we dropped Flash.
http://unity3d.com/support/resources/unite-presentations/advanced-web-player-integration
It seems unity3d.com would like to add an extra click to your experience of watching that video because it doesn't seem to have an embed option. (Burn on extra clicks!)