Complex sentence: In March 2008, OverDrive announced that it would distribute a collection of around 3,000 audiobooks in the MP3 format, which are compatible with most digital audio players including the iPod.
Split into simpler sentences: In March 2008, OverDrive announced that it would distribute a collection of around 3,000 audiobooks in the MP3 format. These audiobooks will be compatible with most digital audio players including the iPod.