On the flip side, I find it pretty annoying when people email
4MB photos. Resizing has its place.

I find GIMP to be like smashing flies with a hammer for most
photo manipulation, and the included photo utility in Ubuntu
is next to worthless, so I stick with Irfanview under doze.
If there was a form/fit/function equivalent to that in Linux
I'd jump on it. I use IPTC tagging and to date I don't know
of any Linux programs that support that (in a friendly way).