On Mac OS X how can I change screenshots to save as low res JPG insetad of a PNG? I also have quicksilver installed and use the "capture region" shortcut quite often - not sure if that would have any effect on the answer here.
The answer below is great for getting a jpg version. Thanks!
But is there some way to get a low res version though? Or possibly a script I could use to convert to a low res version? Maybe with quicksilver? Or a screen cap utility that would allow me to set the jpg quality?