internet access
The local Internet Service Provider TNG (http://www.tng.de/) operates free wireless access points in the downtown area. Access will be blocked after-hours. A list of locations is available on the TNG Spot website (http://www.tng.de/private...) German.
Commercial WiFi based access can be found throughout most parts of Kiel provided by various operators. Most will not allow you to use your international roaming plan like iPass, though.