A downloadable client would be awesome.
I agree with this. I actually initially looked for one.
I agree, the mistakes of accidentally hitting the back button or refresh on your browser are extremely severe at the moment. There is no chance to re-enter the game for multiplayer or single player games and for multiplayer you will get bad "karma".
Also if you are briefly disconnected, which will happen occasionally on WIFI with laptops then you will make the game hang up in multiplayer. One or two players will see it as player 1 turn and and you can still use the chat, but Player 1 will say that they cannot roll the dice and say that Player 3 is still on their turn. I have been on both side of this.
WIll there be a mac client?