Hmm...don't expect it in March. Santa Rosa is being released in May. Not to forget, Intel is releasing new sets of Core 2 Duo processors (although the desktop ones had been covered extensively, the notebook ones are still very vague...if there is any new ones at all in Q2). Apple would most likely wait till it is (Santa Rosa...and hopefully new processors) released, used it (or them) in their new Macbook/MBPro hardware refresh and introduce Leopard...and a tagline like 25% faster or something like that.