My Kilo became a dedicated commuter bike after getting the Big Block. I'm using Topeak's solution, which uses an integrated trunk/pannier bag that slides onto a seatpost rack.



It's perfect for lightweight commuting. I can fit a couple changes of clothes, small towel, snacks, raingear, toolkit and U-lock. If you have to lockup outside, the bag slides off the rack in two seconds. It even comes with a shoulder strap.

http://topeak.com/products/Bags/RXTrunkBagDXP

http://topeak.com/products/Racks/RXB...de_frameV-Type

btw you'll probably want to get some beefier tires, those 23c Kendas are no fun on rough streets. I'm rocking some Panaracer RiBMo's 28c, they're comfy and bulletproof.

Overall, this bike is a joy to ride to/from work.