Domain name hijacking has become increasingly prevalent in the last few years. I’ve watched two fairly major domains be stolen out from under their owners’ noses, though they thankfully got them back. Be cautious, and take care that no one walks away with your domain. You may have a hard time getting it back, and could take a hit in the search engines and lose some potential visitors.
As I’ve said quite a few times: Your domain may be your most valuable asset. If you lose your domain, your website might as well not exist. No one can access it if they don’t know where to go.
Kevin from Blogging Tips has a great post up on this very topic. How Secure is Your Domain?