I also posted this on IMDB, cayse I'm trying to spread the word to as many fans as possible!
According to these sources:
Merlin is coming to the Syfy channel in March, and season two will follow!
If you want to catch up on the first series, though, you'd better make sure you have some coffee handy. Syfy will rebroadcast the 13 episodes in marathon format on Sunday, March 28, 2010 starting at 10 AM ET. The series will then continue with the never-before-seen-stateside-second-series as part of their regular Friday slate of original programming on April 2, 2010; the same night Stargate Universe returns from its long mid-season break, according to The Futon Critic.