UPDATE!!
I bought one, and I'm loving it so far. Everyone seems to prefer 360, and honestly, I'm not sure why (aside from Live being the larger and arguably superior online experience and certain multi-plats supposedly performing better on the 360). The PS3 just seems like a much more polished, capable piece of machinery. It's small, and very classy looking, both in the actual look of the console itself, and in the user interfaces.
My 360 looks like some old video game relic setting on the shelf next to the PS3, even more so when I turn it on and it huffs and puffs like it's going to explode whenever it loads up a game. It's amazing how the PS3 manages to simultaneously be less noisy and yet generates less heat despite the internal power supply.
I really like the PS3's controller too. It comes with a detachable USB cord, and you just plug it in and press the Playstation button to sync it. Then unplug it and you're good to go. When it needs recharged, plug it back in for a while. No messing with battery changes or charging the battery packs.
It also upconverts DVDs, which the 360 does NOT. As I have a shitload of DVDs, this is a nice feature. The fact that it plays BluRays as well pretty much seals the deal for me. And yes, I realize that you can download HD movies onto the 360 via Netflix, but honestly, if I like a movie enough to purchase a copy to watch at home, then I'm most likely going to want a physical copy on disc with a nice illustrated case that can sit on my shelf. If I only care about it enough to rent it, then I'll get it from RedBox for a dollar.
So I'm pretty much sold on the PS3. But that's just my 2 cents. Take it for what it's worth...