The Phoenix Mars Mission is scheduled to touch down on Mars today, May 25th, at around 9PM EST. Keep track of the progress on the mission's website. We'll keep you updated with details.
Update: You can watch live coverage of the landing on NASA TV. Mission briefing starts at 3PM EST, and landing coverage starts at 6PM EST.
Update 2: Here is a detailed minute-by-minute breakdown of what Phoenix will be doing for the rest of the day. The propulsion system pressurization will begin shortly. NASA will also be live-blogging the landing from inside Mission Control.