These guys had an app for iphone,and I think Blackberry as well, not sure if they have anything for Android, but it doesn't hurt to check it out. Mods, sorry if this is breaking the rules as far as links, I don't think it does tho...
Juicy Development
My local feeds are in the list on Policestream, but I have yet to see them online....always off
RadioReference.com - Scanner Frequencies and Radio Frequency Reference
click "live audio", then "live scanners". CLICK "CANCEL" EVERYTIME WHEN THE WINDOW POPS U TELLING YOU YOU NEED FLASH PLAYER, IF YOU CLICK "OK" IT WILL FREEZE YOU BROWSER. (at least until the flash player comes out):icon_ banana: From the pulldowns on the left click the state you want, then it will give you a list of what is available. I was able to click the "itunes" file on the right then click on the listen speaker on the left. Once it downloads click on the file. My droid opened the file in "droidlive", I have the free one so saving it as a bookmark is not an option, but it will be in the history list for a while.
Yea the philly one works for me but the Delco one seems to be down...I picked up PoliceStream in the Market a while ago. It does the job well, I wish it had a favorites feature though for quick access to my city.