I love discovering funny blogs, even if they've been around since 2005. (Obviously, I'm "cutting-edge" when it comes to spotting "great" content on the internet.)
As a writer and former editor, I especially enjoy grammar-related humor. So in honor of the upcoming National Punctuation Day (September 24), check out The "Blog" of "Unnecessary" Quotation Marks. (On the right side of the website, there's a handy list of the most popular photos. I especially like the one of the "security guard" pictured here.)
If you need more grammar-related humor (and really, who wouldn't?), there's also Apostrophe Catastrophe.