I saw an advanced screening of 300 this past Saturday. Plotwise it's not as good as Gladiator, but it is a visual masterpiece. Just imagine Gladiator+Troy+Lord of the Rings. The actors that portrayed the 300 put some serious physical work into their roles, they were all ripped....not huge ripped, but the type of ripped most guys would like to be. The fighting sequences are top notch. Very well worth seeing. This is a film I'll definitely be getting on dvd in hopes of getting a director's cut.
Got to watch it last night, at the Imax none the less. Man, it was incredible. Visually it was one of the most stunning movies I've ever seen. The story is pretty much verbatim from the book, with some stuff added here and there (won't say what), so I wasn't disappointed at all. The battles and fighting were excellent.