I bought a portable DVD player on the weekend, a Mustek MP72. It has a 7" screen but it's not that portable as it's kind of big and bulky. It must weigh 2 or 3 pounds, maybe more. The dimensions are: 15.5(W) x 4.1(H) x 21.0(D) cm. Note the height, it's rather thick. Also, the battery is seperate and it's this huge, ugly block that attaches to the top edge of the player. The cover that pops up when you eject a DVD is rather flimsy, made of cheap plastic. One good thing about it is that it seems to play Xvid files just fine. It also plays MP3 files and displys photos, although I haven't tested out that functionality yet.

The screen is 16:9 and 4:3 material can be viewed in stretched mode or pillarbox. The screen looks fairly good, although you can see the individual pixels sometimes. I had to turn up the brightness a notch as well, the default settings are a bit too dark. The sound is too low, you need to have it cranked to the max for decent audio. It does have a headphone jack which works a lot better than the tiny, built-in speakers.

The menu system is almost identical to the one on my RJ-Tech DVD player, which was great as I am already familiar with it. Although it is a bit cludgy at times. The unit has only very basic controls on the player, you need to use the supplied remote to do anything more complicated than play or stop. It's a tiny, credit card sized remote powered by a watch battery. This unit can output progressive scan and digital audio, but you would need special cables to do that and they are not supplied with the player.

Despite all its shortcomings, I am fairly happy with the player as it only cost $69.99. My main gripes would be its size and weight.

Update: I tried the audio/video input and it works, although you use the same cord as output. So it can only take output from the back of a receiver or DVD player, not the cord from a Gamecube or PS2. Although you could probably get an adapter of some kind if you really wanted to do that. Battery longevity seems pretty good, I watched a full movie the other day and it still had power to watch some more crap. It should be good, considering the size of the damn thing!