Interfacing a USB pen drive to a PIC

Will it be possible to make an interface for a USB pen drive to connect to a PIC like PIC18F4550 which has a USB port. If it is possible then a MP3 player can be built around using the pen drive as the storage. But i was wondering whether it will be possible to write codes for this.
Any suggestions?

The PIC has a USB device controller - it has to connect to a host controller. The same is true about the pen drive. You would need to find a controller with a host USB port. The software won't be easy. This isn't a project for a beginner.

bmcculla said:

The PIC has a USB device controller - it has to connect to a host controller. The same is true about the pen drive. You would need to find a controller with a host USB port. The software won't be easy. This isn't a project for a beginner.

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Can you suggest a USB host controller that can do this? I am also interested in doing this.

Atmel's high end ARM processors have Host controllers. Most chips with host controllers are 32 bits. Cypress has separate host controller chips.