It's a rather trivial task, actually. I found a couple simple journal/blog scripts on my venues, when I was trying to find a canned solution, but they were all of very shoddy quality/style. I too just wanted something very simple. Eventually I decided that if you want something done right, you gotta do it yourself.. what I'm tossing around in my mind is a not much more than some glue for Tie::File and Template Toolkit 2, probably with a bit of FreezeThaw and pack/unpack thrown in for good measure.

Makeshifts last the longest.