Hello, guys! I am thinking about inserting the following
additional cards into my Peg and i'd like to ask what cards
can be used and what software exists for them. The things i
need are:

1. FM Radio card
2. At least one additional serial port.

This FM Radio works with Poseidon. There is a shell command, which could scan the radio stations.

http://www.google.com/search?q=usb+0x04B4+0x1002