I'm having a lazy Sunday today, and I just watched Tristan + Isolde on HBO on Demand. It was fantastic! Quite possibly the best period film that I've seen in a while. It got abysmal reviews, but I completely disagree with them. On Rotten Tomatoes, people complain that the lead actors (James Franco, Sophia Myles) underacted their roles. I found it refreshing to finally see a period film where the actors don't go around yelling all their lines and calling it a "passionate performance." If you haven't seen this film already, check it out and decide for yourself.
After seeing the movie, I did a wikipedia search, and found out that the story of Tristan and Isolde is the basis for the Arthurian story. That's probably why I liked it so much. I love movies based on Arthurian legend, and this is pretty much the same story in a different setting.
Here's some info from Wikipedia about the legend: