It’s been a while since we posted some really bad Facebook ads, so for this week’s Facebook Fail Friday we kept hitting the refresh button and here’s what we saw passing by…

More and more soccer fans are rooting for their favorite teams by changing their Facebook profile pictures to their country’s soccer jerseys, and specifically that of their favorite players. Most of these supporters aren’t Photoshop wizards though, but there’s a popular Facebook application called 2010 World Cup Jersey that does the hard work for you.

Last week, we mentioned the appearance on Facebook of Twitter’s very own fail whale. This led us to dig up a post on Mashable in which several readers contributed their own version of the Facebook Fail Whale as it could be used during technical difficulties.

A new kind of M&M with a round, pretzel ball hidden inside? We’re nuts about the regular nuts, but these are supposed to be salty, crunchy, sweet and lower in calories. Too bad M&Ms two free Facebook gifts starring the pretzel M&M don’t come with a flavor.

The fail whale is the latest meme on Facebook, and there’s no doubt it jumped over from Twitter.

As diligently noticed by Jello on the reface.me Page, Facebook has just turned on the “Like” button for comments. The extension of the Like feature to comments has been a popular request for a while, and the albeit little change will tremendously increase the number of likes.

We noticed this little message from Facebook on our home page today, offering us to “apply to be a beta tester and get the first look at upcoming Facebook products.” Needless to say, we clicked it.

This flowchart by Wired’s Mathew Honan helps you decide where to head for a chat, depending on your current status, intoxication level, interests and clothing.

Even if you have only accidentally watched just a few seconds of the World Cup 2010 while flicking channels, you’ll have heard the sound of the vuvuzela. The stadium blowing horn, approximately 1 meter (3 feet, 3 inches) in length, is the favourite instrument of soccer fans in South Africa. And right now, it’s also the most hated instrument in the rest of the world.

Every Friday we post a Facebook Fail and today’s mishap is one that could easily happen to you, if you’re stalking an ex or a secret crush on Facebook. So be warned!

Celebrating today’s so-called “beach party” at Threadless (all tees $10, all hoodies $30), we’ve made a new tag your friends picture featuring some of their best t-shirt designs.

24 hours really fly by, don’t they ? Next time, we should do an Upside Down Facebook Week! What do you think?

Upside Down Facebook Day 2010 is coming to an end. And if there’s one more thing you can do during the final hours of UDFD, it’s to “like” a funny “upside down” themed Facebook Page. Here are our personal suggestions…

Has the pilot of this Vintage Boeing plane taken Upside Down Facebook Day too seriously? I mean, what are the odds?