RS-232 + 4 i/O + ethernet + internal Flash [SOLVED]

Thanks silasmoeckel for clearing my concepts.

I will use the ethernet anyway and I will follow researching about eeprom and the SD advantage related to my project.

For the EEPROM i found this: Recommendations For You - DealeXtreme

For the USB host I found this: http://www.circuitsathome.com/arduino_usb_host_shield_projects

so:
read from the device -> save into EEPROM -> connect the USB pendrive and save the data into a file.

It's possible or I am insane?.

Thanks for all help.

Akuthor