Oh, HAY-YULL yes!
If you watched Sin City and thought, "Hmm, that was extremely bitchin, but it would have rocked even harder if it had been based on a true story about a small band of elite warriors saving the world from an immense barbarian horde," then 2007 will be your lucky year. Frank Miller's 300 is coming to the big screen in March.
For some reason, the trailer at the official site locks up about 2/3 of the way through. But the one at IMDB goes all the way through. Or if you have a few tens of megs to spare, you can download the whole beautiful thing here. WARNING: unless you have an extremely robust constitution, there is a high chance that watching this trailer will blow your retinas out your rectum. Caveat voyeur.
P.S. If after watching the trailer you are dying for more Thermopyloric action, check out Steven Pressfield's excellent historical novel, Gates of Fire. Few events in history require no embellishment. This is one of them, and Pressfield's book is both scrupulously accurate and hellaciously awesome.