Yogurt works really well, and jello is soft enough that you can swallow it without having to chew. And if you nuke ice cream for 10 seconds or so, it gets melty enough to eat. But I'm with you -- if I never see mashed potatoes again, it will be too soon.

When I was in the hospital and had a horrible throat infection and mouth ulcers, I was on the baby food diet (everything, and I do mean everything, pureed) for several weeks. I lost 23 pounds! Not the diet I'd recommend, though.
I hope you feel better soon!
Love, Candy