DanmanX

Ok, let me just say a few things:

My Axim X30, I encode under PDA with a relatively low bitrate at 320x240 (depends of course on widescreen or not).

PocketDivXEncoder with DivX video semi low quality around 100kbps, 2 Pass Encoding [always], and 22khz 24kbps mono mp3 sound are my usual settings. For instance, I just downloaded a 700MB divx rip of Spaceballs (not too worry, I own the DVD, just for saving time I downloaded the rip to convert faster) and converted it by my settings. The file was 92.3MBs. Of course, you could always turn up the quality. The reason why mine is always low is because I want to store as much as I can in the little storage space I have!

For X50v/51v owners, I would recommend a higher resolution with at least, bare minimum 50-75% higher bitrate. Sound quality can stay the same. Seriously, you do save alot of space with toning down settings.

To beat the dead horse: TCPMP. Best player ever.