Missing:
Lighting - red blinky for the back, LED headlamp for your helmet that can also be used in the tent/at camp.
Towel.
Spare tire.
Entertainment - Music/book/cards.
I use an accessory that turns my thermarest into a chair.
Iodine Tablets for cleaning water.
sunscreen, toiletries
address book / info you need about your money (account #'s, passwords)
warm hat/headband
rain gear (unless that's the poncho)
lock

Extra:
only one fuel bottle
only 2 pairs of shorts
only one tshirt

If you are not sure, and you have room, take it. If you don't use it in a week or two, send it home or donate it to someone.

Make sure your bike clothes are fast drying, wash them out every night in the sink/river and fly them off your rack the next day. do real laundry once a week or so.