Far as I know, all the Olympus DSLR's are a 2x crop, so a 14mm lens gives you a 28mm angle of view.

Let's start with this - why do you want a digital camera? There are plenty of good arguements for and against both, but what are you hoping to gain from using digital? As far as the lens goes you'd probably need about an 18mm on a Canon with a 1.6x crop factor (such as an XTI) to get the angle of view that you're used to. Lots of options with this, including a lot of kit lenses.