Whilst we are sure that many of you regularly head over to the official Pink Floyd Facebook page (along with, hopefully, the Brain Damage FB page!) we also know that a significant chunk of you don't indulge in this particular social networking platform.

Now of course, this month marks a particular anniversary. The exact date of release on either side of the Atlantic cannot be agreed on and there has been much discussion over when the album hit the stores in the UK and US, but irrespective of that, The Dark Side Of The Moon celebrates the 40th anniversary of its release this month - quite a landmark.

Those who have been keeping an eye on Facebook (and the Floyd's Twitter page, too) recently will have seen some very interesting images starting to appear. With a Twitter hashtag of #DarkSide40, it is clear that the band are just as keen to mark the anniversary - and for those who want to steer clear of the world of tweets and suchlike, you can enjoy the images unveiled so far over at PinkFloyd.com too.

Each of the separate images includes a link to this page, where you find a 7x7 grid which is gradually filling up as each interpretation, or version, of the cover is made public. Posted so far have been a mix of expected - some of the lovely "Liquid DSOTM" pictures, some of the variants done for Roger's tour materials, and some previously unseen pictures, such as a new stained glass image which brings to mind The Final Cut with a knife poised to plunge into someone's back! Click the thumbnail to the left of this story to see progress so far. The live grid enables one to click on each image to view at a higher resolution and size.

It is testament to the enduring popularity of the album, but also to the design skills of Storm Thorgerson and his team at StormStudios, who are the ones who have worked so hard to create all of these.

As to how the grid continues to build, we will keep watching with interest...