Funny sites:

• the Fiftysevenapage[weird]
• The Neoscience institute[hilarious, read the 10 commandments as applied to duct tape and the Codex Idiotica]
• Computer Stupidities[very funny]
• The oxymoron[hours of fun!]
• Autodynamics[Pretty dern funny, if you know some cosmology]
• Mr Cranky rates the movies!
• BOFH[Excessively funny page if you have an evil streak]

Places to go if you have several hours to kill:

• Sodaplay[takes a while to load]
• Userfriendly daily comics[People post links in the comments, too]

Reference/Web design sites:

• HTML Goodies[recommended]
• Dynamic drive
• Website Abstract