"You can resize the images in Wordpress when you've uploaded them."
Yes you can, but it's not very precise. Large, small, medium, etc., don't help. I need to be able to resize to specific dimensions, 250 x 200 and 250 x 148 pixels, at 72 dpi.
"iPhoto will let you crop and then File/Export to resize. I think iPhoto automatically converts to 72 DPI."
The problem is that I'm not sure how to crop to be able to resize to the desired dimensions without distorting the aspect ratio. I seem to remember Picnik had a way to let me kind of feel my way through to get both the crop and resizing right, all in one program, so I didn't have to make any "final" decisions until everything was right.
So I think I'll check out Graphic Converter. It's tax deductible, I guess, since I'm a contractor. Thanks again.