The current-but-one version (labeled a 'project,' not a beta) gave me a smidge of trouble on a dual-monitor setup, but the current 1.2.4 version seems to be working better, and it also cleared up a conflict with Growl. I'll do a few captures here and get a gallery together to see how they look. Jing isn't going to replace power tools like Snapz Pro, ImageWell or Skitch, but it's pretty good at what it does. Also, as Laurie pointed out, the Jing installer comes with a handy 'autoinstall' AppleScript that copies the application and then unmounts the disk image -- particularly useful for those friends and family (you know who they are) that seem to get confused and end up running applications from a mounted .dmg instead of installing them properly.
Thanks Laurie & Dave