Bear in mind that putting CAD on the web costs money and personel time, neither of which is in much supply in most public safety groups.
They cannot just tie the 'real' CAD to the public web, due to privacy issues. So someone must code each CAD call manually for 'web allowed' or not, which is more work for the weary dispatcher. And putting it on web does cost money. So unless someone at the department in question has a personal strong desire to do it, it's not going to happen.
That said, there ARE some local CAD systems up:
Cleveland National Forest:
http://63.196.254.151//Wildweb/wccnf.htm
Ventura County FD:
http://38.101.117.146/fireline/index.html
CHP:
http://cad.chp.ca.gov/default.asp
If you feel really energetic, you can add a discriminator tap to an old scanner, and use a program like POC32 with your computer's sound card to monitor the San Diego County pagers, which include Escondido Fire, Heartland Fire (some), and CDF (some), POCSAG 1200 on 155.940 -- Yes, it's legal, since the ECPA only bars monitoring pagers on COMMON CARRIERS, which the private channels of a public safety system aren't.
San Diego City uses 154.085 and 155.685 for paging, but it's in the very old GOLAY mode, which I can't deal with. (Motorola owns it as a proprietary mode, and made a VERY firm effort to smash anyone publishing programs to decode it into teeny little bits, worldwide)