I don't think there is a better database than what we have here. It is the most uptodate and most accurate information you can find. Plus the admins live in the areas that they mod in the DB, so i don't think it gets much better than that.
I just love going to a site and getting slammed with pop-ups (yes, I have a pop-blocker and I am using FF) I always found everything here at RR. but I have used this site in the past http://www.arresthistory.com/fccl.asp
Cityfreq has been around for ages. I remember seeing it in Google back in 1999 haha.
Besides RR, a great place to find frequencies is www.antennasearch.com
You enter your address (or where you want) and do a search and it displays all the licensed radio sites near you. Then plug in the callsign into RR or the FCC to find frequencies and other useful info. I find some goodies using this method, good luck.