SpaceX is scheduled to launch a Falcon 9 rocket into orbit today, carrying a Turkmenistan communications satellite. The 90-minute launch window opens at 22:14 UTC Monday night (6:14 p.m. Eastern time).
You can watch the launch live on the SpaceX LiveStream channel, NASA TV, and NASA’s Ustream channel. I will live tweet it, too. Update, April 27, 2015, at 17:45 UTC: My friend Robert Pearlman of CollectSPACE tells me this won't be on NASA"s channels since it's not a NASA launch.
Before you ask, there will not be an attempted landing of the first stage booster for this launch. The satellite being launched is going into a geostationary orbit, 40,000 kilometers up, and a lot of fuel is needed to get it there. There won’t be enough left to slow the first stage and land it, so it’ll drop into the Atlantic.
I think the most remarkable thing about this launch is that (if it goes off on time) the most recent Falcon 9 launch was only 13 days previous (on Tuesday, April 14). That’s an incredibly fast turnaround time for a company, and a day faster than its previous record of 14 days set last year.
For more info, I recommend this amazingly detailed America Space article. It answered many of the things I was wondering about for this launch. SpaceX also has a PDF press kit with highlights as well.
If the launch is scrubbed (weather may play a factor today) then it is scheduled for the next attempt Tuesday also at 22:14 UTC.