Season 2 of Hayate starts on April 4th (contrary to what this guide says the first 52 episode are in fact all season 1 as aired in Japan). There is also going to be an OAV released on DVD just before the new season starts and it will take place between the two seasons, effectively acting as season 2 episode 0. Check out the following links to ANN and Anidb for more details.
I for one can't wait for more Hayate. It has to be one of the most ridiculous and hillarious animes for years.