I was close to that when I was pregnant with my 2nd daughter (I had reached 220 and I'm 5'3" - I stayed at 200 for almost a year after, too.) and I still found most things comfortable to ride. For the most part, if you don't have any problem bending and lowering yourself into things, (I think the Small World, Jungle Cruise Boats, the 4 Mountain Coaster/flume log rides, etc are the best examples of what I mean by lowering yourself to a level below the platform that you are currently standing on) you should be fine. The Autopia Cars ride low, too.
You have the blessing of size. Not being tall, from what I have heard, tall folks at higher weights have many more issues with shoulder harnesses and the like. I also know they have seatbelt extenders for some rides, too, like Indy. You can always ask the CM at each attraction what they can do to make your experience more enjoyable.
The Nemo seats are a bit of a squish, but you can always choose the disabled experience if you feel claustrophobic. The teacups depend on where you carry most of your weight. If it is in the pear shape range, you may have a small issue but duck and slide. If you are in the overall-earth-mother category, they you might have a tight sqeeze in the stomach. The Fantasyland dark rides might be a little tight in the tummy, too.
Hope that helps - I know more folks will chime in with their experiences at different weight levels.