Yep it is a casting flaw in the head to which Chrysler has so far never admitted fault. So what to do?
We've all been there. Human nature makes us tend to not want to have to deal with something as expensive or as labor intensive as a head replacement. So we say to ourselves "OK, I know the head is cracked, but the engine still runs OK, so if I watch the temperature gauge I can defer the work or expense a while". Or "yeah, the needle is in overheat but I just need to get to the next exit."
Problem is, your temp gauge is a somewhat delayed indication of what is actually occurring in the block. If you are cruising down the interstate at speed and you see it begin to rise, the engine block overheat event is already happening and that temperature is more than the indicated temperature you are seeing on your instrument panel.
There are lots of posts on this board from guys who have run a cracked 00 or 01 head for some time (six months or more). But there are also lots of posts from guys who tried and trashed their engines. Bottom line, you are now gambling with a problem you know can get a lot worse for your entire engine. In the immortal words of Dirty Harry, "Do you feel lucky?"
My advice is search the posts on the "how to" install a 97 or 98 head on your 2000. It's not exactly the same as your head and requires some mods. Worth the effort. If you put on a late 99, 00 or 01 head, history will repeat. Get it fixed as soon as you can.