If you get your bike stolen and the police recover it, how will they know it's yours? Get it registered. Here is a note sent to the listserv about APD's upcoming registration in the area:
I have just learned from Officer Jud Chapman, one of our APD District Reps, the location of the April 27thbike registration.
What:    APD Bicycle Registration
When:   Sunday, April 27th noon – 2pm
Where:  5335 Burnet Rd.
Laura DiCarlo