Futures seem to be reacting positively to...... oh, who knows. The markets are up because the markets really wanted to be up yesterday. Every time there was a hint of a deal out of DC the markets would turn sharply higher. Now, today in the absence of a deal to keep the government open the markets are trading higher.
I'll stick with the consensus here that we'll have a shutdown of 2-4 days with little impact on markets or the economy. However, if the polling starts to give some House Republicans a reason to dig in their heels we could see a longer shutdown (1 week +).
I also believe that the public's unhappiness with Congress will lead to swift hike of the debt ceiling prior to the 10/16 deadline. However, I've been wrong before and I'll probably be wrong again :)