You guys are confusing two different things.
NTSC vs. PAL - these are TV systems. NTSC is used in North America, Japan and a few other places. PAL is used in Europe, Asia and other places. PAL DVD players may or may not be able to play NTSC DVDs, and vice versa. (The frame format is different, so some players may not have the necessary framebuffer space). Computer DVD players, consoles, and possibly Blu-Ray players should be able to, but it's not guaranteed.
Region coding - there are 5 regions in the world, (region 1 is North America, for example). When a DVD is manufactured, it may be configured with a region code, or none at all. When a DVD player is manufactured, the factory sets up a region code on it. A region 1 DVD doesn't work in a region 2/3/4/5/6/7 player. A region 0 DVD works everywhere. There are various hacks available for most DVD players to let them play DVDs from other regions.
Blu-Ray lacks the video system (it's got a resolution - 480i/p, 525i/p standard def, 720p, 1080i, 1080p and a frame rate, and these are well specified), but it has a 3 region coding scheme (A, B and C). Blu-Rays may be manufactured without a region code (You'll see "ABC" on the box), or one of those regions. (This applies to game Blu-Rays as well).
Note that video system and region are NOT related to each other. Every DVD made will be "NTSC", "PAL" or "SECAM" depending on its target audience. Every DVD may or may not be region coded, and while there's usually a relation between region code and target video system (because few North American players will successfully play PAL DVDs, for example, even region free PAL), but just because it says "NTSC" doesn't mean it's region locked.
Back OT - Amazon usually lists the region code. For this, they don't know, so it may be region free, or it may not. If it is, or isn't, won't be known until we get the DVD.
However, on something like the
Wing Commander Movie, it says "Region: (US and Canada This DVD will probably NOT be viewable in other countries. Read more about DVD formats.)" which means for sure it's region coded.
So everyone eutside North America - if you have a region free player, you're all set. If not, you can hope it's region 0.