I mentioned this here a while ago but it has gotten really good recently so I'll mention it again.
http://mondaypunday.com
My college buddy and comedian Matthew Broussard (he's been a pretty popular local stand up in Houston for a couple of years now, who will be featured on Workaholic's Adam Devine's Comedy Central stand up show Adam Devine's House Party) runs a webcomic site that features a sketch of a play on words. For example:
That would be
"Hairy (Harry) Potter"
He's done a bunch of them and it's a fun way to waste your day and he updates it every week on Mondays, obviously.
Let me know if you can't get any of them, I have solved all but a couple of them.