CMS for Front end Designer - What do you guys do ?

Hi guys

I was just wondering. Lately I have gotten a lot of clients that wants to update there websites themselves. So far I have managed with the limited back-end programming I know. Which is really not that much.

I am a front-end designer. I do action-scripting, flash, Java, Xhtml etc. etc. Basic updating I can program. But what if a client wants more.

How do you guys go about doing that. If a client wants to update there own website themselves ? Do you just assign 1 page or so that can be updated , or do you give complete control to the client to change any content.
Explain to me how you would go about doing this.

I was wondering also about pricing. Seems to me that if a client wants that, they will have to pay much more. Or am I a bit behind the times.
Thus far I have been creating websites for people and I have been updating it for them.

Is there software that is fairly easy that I can program into my code ?

Hope all of you Gurus can shed some light on this. It would help me out a lot.