Over a month ago, and now being reported in the media, the removal took place of a number of Pink Floyd albums from online stores such as iTunes and Amazon MP3s. It's all their albums from Wish You Were Here onwards (with The Division Bell disappearing over a year ago as an online entity).

EMI and the band failed to reach a new distribution contract, which means that EMI do not have the authority to distribute the band's works electronically or on CD. The albums up to and including The Dark Side of the Moon are handled under a different contract, so those are still available. EMI can continue to sell its stock of Pink Floyd CDs, but once they're sold, it cannot produce more. If there are gaps in your collection, might be worth filling them now!

The CD production restriction doesn't, however, apply to Sony Territories which still have The Division Bell and Pulse CD (i.e. North and South America, Australia, Japan, etc.).