I was tempted to invest in Fold3 but after reading these comments, I've decided against it. I'm having a lot of trouble trying to find Civil War records from ancestors in Florida (or ANY records, for that matter, because Florida records are so sparse).
I stumbled on
Civil War Soldiers Database - American Civil War Service Records and a few names popped up, but it's hard to tell whether they were casualties or not. (I may be doing something wrong.) Anyway, I wanted to add it here because I'm really trying hard to break through Columbia, Hamilton, and Hillsborough counties in Florida, and it's a real struggle. Thought it might help others from all over the country as well.