1. Is Mp3 Playback good on this? Comparable to that of an iPod?
MP3 playback is fine. As I don't own an iPod, I can't comment.
2. Is Video Playback good on this? Comparable to that of a Palm?
I don't see much improvement over the video playback on my T3. However, I am not really into videos.
3. Are PIM applications quicker or slower than that of a Palm?
Compared to my T3 (400 mhz), the X30 running at 624 mhz is about the same. If you leave it in auto mode, it will slow down to 208 mhz and will be visibly slower than my T3.
4. Do you feel satisfied with your purchase or do you think you should have gotten something else?
I've had my X30 high since 6/8 and have been waiting for a replacement since 6/10

so I haven't been able to fully use my X30 (things like the d-pad not functioning, the inability to scroll in PIE, the screen sensitivity, the too-low sound output). So if I ever get a replacement, I'll be able to figure out whether it was worth it. At this point, my answer would have to be no.