Looking for a free, simple PHP guestbook script - couldn't talk the client out of the idea - and I remember using something fairly easy to set up a few years ago that used a simple txt file to store the guestbook entries. Does anyone have experience with any such script?
Was it phpbook by any chance? It doesn't need a database. However make sure you read the warning - it's not being maintained.
I've been there, I empathize!
Take a look over here at hotscripts, the first three are paid ads for commercial products, but I can give a +1 to Online Guestbook Pro, HS have a decent rating system to help you out.