Podcasting is changing the way information is being distributed, now you only need to subscribe to a podcast, then new episodes will be delivered to your computer.
A.
Podcasting is changing the way information is being distributed. Now you only need to subscribe to a podcast, and new episodes will be delivered to your computer.
B.
Podcasting is changing the way information is being distributed; now you only need to subscribe to a podcast; and new episodes will be delivered to your computer.
C.
Both A and B are correct.