We just purchased a SmartDisk FlashTrax to take on vacation. It was cheaper than buying a a couple more high speed cards for our D70. The FlashTrax looks like a GameBoy with a small lcd screen. The one we purchased for about $340 holds 20 gigs- but you can buy one that holds up to 80 gigs.
You just download your photos to it directly from the card. It also has a usb cable to hook up to your computer. On newer television sets - you can plug the FlashTrax in and show your images on screen. So, this may work with your projector. It's a lot cheaper than buying a computer - and it's quite compact. The FlashTrax also holds mp3's.
I haven't been able to tear it out of the hands of my husband yet - who hasn't stopped playing with it since it arrived yesterday. But I would think if it will work with your projector - it would be the perfect "toy" aka "necessity"
I am not a PC expert and may be my PC is running low on memory due to too many photos. I have lockups often and it is slow. Question is: should I buy a Mini mac or iMac or power book. For the Mini, I have to have a display, key board and mouse and so even itself is small and portable, the rest of the hardware would make it not portable. At home it is Ok since I can hookup to my 21" monitor, keyboard and mouse. Then what about the iMac with G5? Yes, it would be more expensive, more than double. Has anyone figure a way to move it around using a hard case? And forget the heavy stand? Is it too heavy to be practical? Well, the last thing is the 12" powerbook which is most portable with display. I do have a Viewsonic project that I used sometimes for powerpoint - only once awhile. May be I can buy a external something so I can download my photos or ppt presentation into it and hook it up to the projector directly. So, I do not have to bring any computer. What is the best and cheapest unit that can hookup to a project directly?