I've only owned / used 3 digital cameras capable of photos where you can see the bus (my first digital camera I got in 2000 was one of them pencil style cameras but the images were like 100 pixels wide or something.

My first decent digital camera aquired in July 2003 was a Kodak CX4210 Easyshare. Sometimes tempermental with moving vehicles on dull days, has produced some good photos such as these two:
http://www.flickr.com/photos/gjm-photoge...402195605/
http://www.flickr.com/photos/gjm-photoge...5870932898

My second camera (and one I now refer to as old reliable) is a Sanyo VPC-MZ3 which was aquired secondhand off one John Atkins in November 2004 and it's probably the best camera I will ever own, takes photos in just about any light, even on the dullest of days I only end up with up to 2% photos that are not usable, and that is only in rare cases. I have no idea on how many photos I've taken with this camera that I still now own, but I have taken many brilliant shots that it's hard to choose a good photo but here is two of them:
http://www.flickr.com/photos/gjm-photoge...4851722726
http://www.flickr.com/photos/gjm-photoge...8240109995

My third camera is also one that is currently in use, it's a Samsung ES60 and normally you see it hanging around my neck for quick access as it's quicker at starting up then the old Sanyo. It's my high defination camera, and I mainly use it at bus rallies, bus depots and usually on stationary vehicles, but I have on occasion used it on moving vehicles which 90% of the time it works with it increasing to 99% on lovely sunny days. Here are two examples of my photos with the Samsung:
http://www.flickr.com/photos/gjm-photoge...5870932898
http://www.flickr.com/photos/gjm-photoge...7796278940

I have used cameras on other devices such as my mobile phone. Quite impressed with photos from my current HTC Sensation phone.
Also got a camcorder which I've taken one or two photos on, but now it's rarely used as I find it gets in the way too much, and normally I only really video trains.