some of the disposable digital cameras are little more than 35mm disposables with prepaid cd's so if you have a 35mm you already have a perfectly good digital camera just have that cd made with your processing and yes once you have the digital images...
You can get a nice 35mm SLR for around $100, and then a good zoom lens for another $100. Maybe more, maybe less. If you're looking for digital, find a camera with 12x zoom. Like the Canon S3 IS, or some of the many Panasonic cameras. Try to stay away...
for fine art, landscape, architecture: film most other things digital will do 35mm or meduim format Leica is the best.