We're a team of students from the University of Edinburgh and we are creating a website that should help cyclists find the safest path to take between two locations. You can find the site here: edicycle.eu.
It's still very much a work in progress: refining searches by date and time of day, displaying bike storage facilities, and adding bike theft data are all planned.
But for now, we'd like as much feedback as possible so play around with it, try to break it, use it to rethink your commute, just tell us what you think.