Well, don't feel too secure storing just the MD5 of your passwords. It's a good pratice, but it is possible to get the password from the MD5 by brute force attack, for which programs are not uncommonly avaliable.
That said, it will at least make anyone who retrieved the password MD5s(which shouldn't happen to begin with) work to get the actual passwords. So lazy people will be stopped. hehe ^_^