I know that most Panasonic and Samsung cameras have an analog output. Current models IP performance is not effected by analog output. Samsung cameras the analog output can be enabled/disabled in the setup menu.
In my experience, stating that the analog output is for installation is due to the lack (due to cost) of proper protection circuity on the analog side that would normally be in place for a standard analog device. My recommendation is to put an in-line surge supression device on the BNC line, just in case.
That being said, I have connected analog monitors/DVRs/encoders up to the analog output on both of these brands with no problem. One thing to remember is that if the camera has a 16:9 imager, the analog output may be cropped or have black bars and not fill the screen. As Brian mentioned, the quality won't be great, as you will typically have a megapixel camera and you are displaying NTSC 704x480 resolution.
There are a variety of monitors that have a built in camera and automatically displays the internal camera, while streaming it out to your NVR/VMS.