Apple has cause to celebrate, with its iTunes Music Store selling more than 500m songs. The 500m mark was actually exceeded yesterday. If current trends continue, Apple will have sold two billion songs in the next ten months.

Muddying the water slightly is Apple's own attempts to drive sales past the 500m mark, which included a monster giveaway to the buyer of download number 500m. Prizes included ten iPods, an 10,000-song iTunes gift card and an all-expenses paid trip for four to see Coldplay live. Apple also said it would hand over an iPod Mini and a 50-song bundle every 100,000 songs.
What's next for iTunes? Well, sources close to Apple say that the service will likely expand to include videos, selling at $1.99 a go.