What's your digital identity?

Digital Tattoo is a web-based learning resource created at the University of British Columbia to support students in learning how to be proactive about gaining control over their digital identity.

And over at SCoPE, there's a discussion about the many threads digital identity can entail. If we hold back what we share about ourselves digitally, are we creating roadblocks to knowledge sharing and knowledge making? If we post that less that flattering photo, how will it haunt us in the future, and even if it does, will we be forgiven?