ALL of my road bikes have a seat bag. The Miyata 710's is the smallest, but still enough to hold two tubes, patch kit and tire levers.
The Fuji and Univegas that I use for commuting all have old-school Cannondale 'Toot' seat bags that hold more tools and other 'stuff', like wallet, cell phone, keys, handi-wipes... I don't wear jerseys, so no pockets for that stuff...
[MENTION=398641]PastorB[/MENTION]obmlnh's ride: