The 1D is a great camera, I have had one for over eight years, but by today's standards it is vastly outclassed in every metric by many lower targeted bodies.
Anybody thinking of getting an old 1 series should only really look at the 1D MkIII for APSH, and the 1Ds MkII and MkIII for full frame, they are all good buys. However the 1D and 1Ds are very dated, no zoom review, no live view (nor in the MkII), very small LCD's, primitive menus, few mp's etc.
The 1D does have a couple of interesting quirks with the 1/1600 max shutter speed and the 1/500 sync speed but unless you need these and only 4MP, and that is very few believe me, then the later 1's are much better buys.
I was doing full on reportage and weddings (augmenting 1VHS's) with mine back in 2005/6 and whilst I still love some of the images I feel bad I can't do much with them with the RAW files being so small.
Here was one of my favourites at the time, some monks at Angkor Wat. Oh how I wish I could have taken that with a 1Ds MkIII