I actually use CVS, but it is wrapped in a script (cmedit) that checks the code out, allows me to edit it, then checks it in. I can put CVS comments in the file itself, which get stripped out and used as the checkin log message.
I am a one-man shop, basically, I've been doing consulting since the early 80's. I needed something to keep up with my changes, so I made my own version control system (written in pascal at the time). As I moved on and up in the computer world, I changed the underlying process, but not the interface. Now it uses CVS, but I still use the same script names. The scripts have also changed, going from sh to csh to bash, but hey, progress happens.
If there is enough interest, I can try to put my script(s) together with some light docu. Right now it is 100% bash, and uses CVS as the version control system.