I was at London Drugs today, I wanted to get a look-see at the new iPod Nano, and I noticed that the back said '4GB'. I though the 4th-gens only came in 8 and 16GB?
There are already a couple theads on this
Use the search feature.
Anyways... there are a select number of 4Gb models.
4GB and 8GB models were already in production when Apple decided to cancel the 4GB and make a 16GB.
This was done to compete with the Zune.