The first of the SpaceX Dragon resupply missions is scheduled for launch today, 7 October, at 5:35 PM Phoenix time (8:35 PM EDT and 00:35 UTC).
The SpaceX / NASA prelaunch press conference is at 3:00 PM Phoenix time on NASA TV.
The schedule for the first 10 minutes:
Weather outlook is for 40% chance of unfavorable weather, mostly a thick cloud violation, with some chance of flight through precipitation.
Cargo for the ISS on this mission includes:
Return to Earth:
You can download the SpaceX press kit (pdf).