Brother Omi of “Star Wars for Colored Folks” sent in this interesting information.  Links to the list of Cities that the Rebel Droids have been spotted in, as well as a frapper account that pinpoints quite a few of them.
Official list of cities with droid infestations
Frapper Map that pinpoints a bunch of them

Now is the time for you all to do the right thing, and support your Empire!  I want each of you to go out to your respective cities and track down these droids!  Then, get a photo of yourself with the droid, holding THIS SIGN:

(Click for full size graphic to print out)

DO NOT, glue or stick these to the droids!  Lord Vader wants them to be identified and their locations mapped out, and they are not to be harmed.  (Plus, there’s the whole “Federal Offense for defacing a USPS collections box” thing none of us wants to have to deal with, right?)

NO disintigrations!  Yes, I’m looking at you, Boba Fett. 

Once you have the photos, send them me at: td0013 AT dragonpage DOT com, and I’ll post them here for all the world to see. 

You have your orders, now get to it!

Thanks again to Brother Omi!  Be sure to check out his site, and read his ongoing fanfic there! Great stuff!