There's a fair few people in the Fuji 690 thread who are now using them! I still have a Fuji GA645Zi which is the only one they made with a zoom lens, albeit only a short range. The optics are superb on all of them, including the zoom. I've owned and sold the GW670II and GW690III which are great for landscape but there's nothing to stop you using them for other general stuff as well, although those don't have built-in light meters. No nightmare stories with any of the ones I had.
How do you find the 645? Any good for portraits? Also is the viewfinder in portrait orientation?