Mac OS X 10.7 defaults to hiding the users Library directory, this is probably to keep people from accidentally deleting or damaging files that are necessary for OS X Lion to function properly. That is fine for novice users, but for some of us, we want to be able to access ~/Library/ at will. A visible Library folder was also the default setting in past versions of Mac OS X, here is how to get this back.
Read the how to here:
Show User Library Directory in Mac OS X 10.7 Lion.